Showing posts with label Pharmacology. Show all posts
Showing posts with label Pharmacology. Show all posts

Tuesday, 4 April 2017

What is the difference between a drug and a medicine?



A medicine is any substance that is designed to prevent or treat diseases and a drug is designed to produce a specific reaction inside the body. While there is considerable overlap between the two types of substances, these differences are also quite important.
    What is the difference between a drug and a medicine?


    Most of the medicines that are also drugs are considered "controlled substances." This means that there are laws governing their use and that using them in ways contrary to those laws can lead to criminal charges. Antidepressants like Lexapro are drugs, in that they are designed to help alleviate the physical symptoms of depression. However, they are also used in the treatment of the chemical imbalance that leads to depression, so Lexapro is also a medicine. Cocaine, on the other hand, is a drug designed to create a specific mental reaction that leads to a "high" for the user. However, the medical establishment does not recognize any medical benefits for cocaine at this time. Over-the-counter anti-inflammatory medicines such as Advil are designed to treat pain, but they do not have a strong enough effect to fit into a controlled substance classification, unlike stronger pain relievers. This means that these are medicines rather than drugs. Understanding the similarities and differences between drugs and medicines is an important part of medical and pharmaceutical training.

    Friday, 31 March 2017

    PHARMACOLOGY MNEMONICS

    Pharmacology Mnemonics

     RTI: drugs to treat viral respiratory infections "You'd geta respiratory infection if you shoot an ARO (arrow) laced with viruses into the lungs":ARO:
    Amantadine
    Rimantadine
    Oseltamivir

    Medication administration: short checklist TRAMP:
    · Before dispensing medication, ensure have correct:
    Time
    Route
    Amount
    Medication
    Patient

    Opiates: overdose findings "Cool to the touch, unresponsiveto pain,
    Hunger diminished, and scars over vein.
    Pupils pinpointed, and blood pressure low,
    Urine diminished, and breathing is slow."

    Cocaine: cardiovascular effect COcaine causes bloodvessels toCOnstrict (unlike other local anesthetics which cause vasodilation).

    Aminoglycosides: common characteristics AMINO:
    Active Against Aerobic gram negative
    Mechanism of resistance are Modifying enzymes
    Inhibit protein synthesis by binding to 30S subunit
    Nephrotoxic
    Ototoxic

    Sulfonamides: common characteristics SULFA:
    Steven-Johnson syndrome/ Skin rash / Solubility low
    Urine precipitation/ Useful for UTI
    Large spectrum (gram positives and negatives)
    Folic acids synthesis blocker (as well as synthesis of nucleic acids)
    Analog of PABA

    Diuretics: groups "Leak Over The CAN":
    Loop diuretics
    Osmotics
    Thiazides
    Carbonic anhydrase inhibitors
    Aldosterone inhibitors
    Na (sodium) channel blockers
    · Note: "leak" is slang for urination and "can" is slang for a toilet.

    Thalidomide: effect on cancer cells "Thalidomidemakes the blood vessels hide":
    Use thalidomide to stop cancer cells from growing new blood vessels.

    Tuberculosis: treatment If you forget your TB drugs, you'lldie and might need a PRIEST":
    Pyrazinamide
    Rifampin
    Isoniazid (INH)
    Ethambutol
    STreptomycin

    Warfarin: interactions ACADEMIC QACS:
    Amiodarone
    Cimetidine
    Aspirin
    Dapsone
    Erythromycin
    Metronidazole
    Indomethacin
    Clofibrates
    Quinidine
    Azapropazone
    Ciprofloxacin
    Statins

    Patent ductus arteriosus: which prostaglandin keeps it openkEEpopEn with prostaglandin E.

    Carbamazepine (CBZ): use CBZ:
    Cranial Nerve V (trigeminal) neuralgia
    Bipolar disorder
    Zeisures

    Morphine: side-effects MORPHINE:
    Myosis
    Out of it (sedation)
    Respiratory depression
    Pneumonia (aspiration)
    Hypotension
    Infrequency (constipation, urinary retention)
    Nausea
    Emesis

    Corticosteroids: adverse side effects CUSHINGS BAD MD:
    Cataracts
    Up all night (sleep disturbances)
    Suppression of HPA axis
    Hypertension/ buffalo Hump
    Infections
    Necrosis (avascular)
    Gain weight
    Striae
    Bone loss (osteoporosis)
    Acne
    Diabetes
    Myopathy, moon faces
    Depression and emotional changes

    Tricyclic antidipressents (TCA): side effects TCA'S:
    Thrombocytopenia
    Cardiac (arrhymia, MI, stroke)
    Anticholinergic (tachycardia, urinary retention, etc)
    Seizures

    Bromocriptine [for USA gang members] The CRYPTS arean LA street gang that likes to smoke DOPE.
    BromoCRYPTine is a DOPamine agonist.

    Beta blockers: members "The NEPAL Prime
    Minister":
    Timolol
    Nadolol
    Esmolol
    Pindolol
    Atenolol
    Labetalol
    Propranolol
    Metoprolol

    Microtubules: drugs that act on microtubules. "The MicroTubule Growth Voiding Chemicals":
    Thiabendazole
    Mebendazole
    Taxol
    Griseofulvin
    Vincristine/ Vinblastine
    Colchicine

    Insulin: mixing regular insulin and NPH "Not Ready,
    Ready Now":
    Air into NPH
    Air into Regular
    Draw up Regular
    Draw up NPH

    Benzodiazepins: 3 members that undergo extrahepatic metabolism
    "Outside The Liver":
    Oxazepam
    Temazepam
    Lorazepam
    These undergo extrahepatic metabolism and do not form active metabolites.

    Guanethidine: mechanism GuaNEthidine prevents NE(norepinephrine) release.

    Parasympathetic vs. sympathetic neurotransmitters "Nosympathy for a Pair of Aces":
    Norepinephren is secreted in by the Sympathetic nervous systemwhile Acetylcholine is secreted in the Parasympathetic nervoussystem.

    Adrenoceptors: vasomotor function of alpha vs. beta ABCD:
    Alpha = Constrict.
    Beta = Dilate.

    Beta 1 selective blockers "BEAM ONE up, Scotty":
    Beta 1 blockers:
    Esmolol
    Atenolol
    Metropolol

    Opiods: mu receptor effects "MD CARES":
    Miosis
    Dependency
    Constipation
    Analgesics
    Respiratory depression
    Euphoria
    Sedation

    Cancer drugs: time of action between DNA->mRNA ABCDEF:
    Alkylating agents
    Bleomycin
    Cisplastin
    Dactinomycin/ Doxorubicin
    Etoposide
    Flutamide and other steroids or their antagonists (eg tamoxifen,leuprolide)

    Busulfan: features ABCDEF:
    Alkylating agent
    Bone marrow suppression s/e
    CML indication
    Dark skin (hyperpigmentation) s/e
    Endrocrine insufficiency (adrenal) s/e
    Fibrosis (pulmonary) s/e

    Tricyclic antidepressants: members worth knowing "I have tohide, the CIA is after me":
    Clomipramine
    Imipramine
    Amitrptyline
    · If want the next 3 worth knowing, the DND is also after me:
    Desipramine
    Norrtriptyline
    Doxepin

    Asthma drugs: leukotriene inhibitor action zAfirlukast:
    Antagonist of lipoxygenase
    zIlueton: Inhibitor of LT receptor

    Torsades de Pointes: drugs causing APACHE:
    Amiodarone
    Procainamide
    Arsenium
    Cisapride
    Haloperidol
    Eritromycin

    Serotonin syndrome: components Causes HARM:
    Hyperthermia
    Autonomic instability (delirium)
    Rigidity
    Myoclonus

    Beta blockers: B1 selective vs. B1-B2 non-selective A
    through N: B1 selective
    : Acebutalol, Atenolol, Esmolol, Metoprolol.
    O through Z: B1, B2 non-selective:Pindolol, Propanalol, Timolol.

    HMG-CoA reductase inhibitors (statins): side effects,contraindications, interactions HMG-CoA:
    · Side effects:
    Hepatotoxicity
    Myositis [aka rhabdomyolysis]
    · Contraindications:
    Girl during pregnancy/ Growing children
    · Interactions:
    Coumarin/ Cyclosporine

    Therapeutic index: formula TILE:
    TI = LD50 / ED50

    Antirheumatic agents (disease modifying): members CHAMP:
    Cyclophosphamide
    Hydroxycloroquine and choloroquinine
    Auranofin and other gold compounds
    Methotrexate
    Penicillamine

    Auranofin, aurothioglucose: category and indication Aurumis latin for "gold" (gold's chemical symbol is Au).
    Generic Aur- drugs (Auranofin, Aurothioglucose) are gold
    compounds.
    · If didn't learn yet that gold's indication is rheumatoid arthritis, AUR- ActsUpon Rheumatoid.

    Antiarrhythmics: class III members BIAS:
    Bretylium
    Ibutilide
    Amiodarone
    Sotalol

    MAOIs: indications MAOI'S:
    Melancholic [classic name for atypical depression]
    Anxiety
    Obesity disorders [anorexia, bulemia]
    Imagined illnesses [hypochondria]
    Social phobias
    · Listed in decreasing order of importance.
    · Note MAOI is inside MelAnchOlIc.

    SIADH-inducing drugs ABCD:
    Analgesics: opioids, NSAIDs
    Barbiturates
    Cyclophosphamide/ Chlorpromazine/ Carbamazepine
    Diuretic (thiazide)

    K+ increasing agents K-BANK:
    K-sparing diuretic
    Beta blocker
    ACEI
    NSAID
    Ksupplement

    Diuretics: thiazides: indications "CHIC to use
    thiazides":
    CHF
    Hypertension
    Insipidous
    Calcium calculi

    Ribavirin: indications RIBAvirin:
    RSV
    Influenza B
    Arenaviruses (Lassa, Bolivian, etc.)

    Parkinsonism: drugs SALAD:
    Selegiline
    Anticholinenergics (trihexyphenidyl, benzhexol, ophenadrine)
    L-Dopa + peripheral decarboxylase inhibitor (carbidopa, benserazide)
    Amantadine
    Dopamine postsynaptic receptor agonists (bromocriptine, lisuride,pergolide)

    Morphine: effects at mu receptor PEAR:
    Physical dependence
    Euphoria
    Analgesia
    Respiratory depression

    Thrombolytic agents USA:
    Urokinase
    Streptokinase
    Alteplase (tPA)

    Anticholinergic side effects "Know the ABCD'S of
    anticholinergic side effects":
    Anorexia
    Blurry vision
    Constipation/ Confusion
    Dry Mouth
    Sedation/ Stasis of urine

    Teratogenic drugs "WTERATOgenic":
    Warfarin
    Thalidomide
    Epileptic drugs: phenytoin, valproate, carbamazepine
    Retinoid
    ACE inhibitor
    Third element: lithium
    OCP and other hormones (egdanazol)

    Antiarrhythmics: classification I to IV MBA College
    · In order of class I to IV:
    Membrane stabilizers (class I)
    Beta blockers
    Action potential widening agents
    Calcium channel blockers

    Epilepsy types, drugs of choice "Military GeneralAttacked Weary Fighters Pronouncing 'Veni
    VediVeci' After Crushing Enemies":
    · Epilepsy types:
    Myoclonic
    Grand mal
    Atonic
    West syndrome
    Focal
    Petit mal (absence)
    · Respective drugsy:
    Valproate
    Valproate
    Valproate
    ACTH
    Carbamazepine
    Ethosuximide

    Respiratory depression inducing drugs "STOP
    breathing":
    Sedatives and hypnotics
    Trimethoprim
    Opiates
    Polymyxins

    Pulmonary infiltrations inducing drugs "Go BAN Me!":
    Gold
    Bleomycin/ Busulphan/ BCNU
    Amiodarone/ Acyclovir/ Azathioprine
    Nitrofurantoin
    Melphalan/ Methotrexate/ Methysergide

    Migraine: prophylaxis drugs "Very Volatile 
    P
    harmacotherapeutic Agents For Migraine Prophylaxis":
    Verpamil
    Valproic acid
    Pizotifen
    Amitriptyline
    Flunarizine
    Methysergide
    Propranolol
    · Bare bones version [eg Lippincott's two], just Migraine Prophylaxis,as above.

    Benzodiazapines: ones not metabolized by the liver (safe to use in
    liver failure)
     LOT:
    Lorazepam
    Oxazepam
    Temazepam

    Vigabatrin: mechanism Vi-GABA-Tr-In:
    ViGABA Transferase Inhibition

    TB: antibiotics used STRIPE:
    STreptomycin
    Rifampicin
    Isoniazid
    Pyrizinamide
    Ethambutol

    Propythiouracil (PTU): mechanism It inhibits PTU:
    Peroxidase/ Peripheral deiodination
    Tyrosine iodination
    Union (coupling)

    Enoxaprin (prototype low molecular weight heparin): action,
    monitoring
     EnoXaprin only acts on factor Xa.
    Monitor Xaconcentration, rather than APTT.

    Beta-blockers: nonselective beta-blockers "Tim PinchesHis Nasal Problem" (because he has a runny nose...):
    Timolol
    Pindolol
    Hismolol
    Naldolol
    Propranolol

    Nicotinic effects MTWTF (days of week):
    Mydriasis/ Muscle cramps
    Tachycardia
    Weakness
    Twitching
    Hypertension/ Hyperglycemia
    Fasiculation

    Muscarinic effects SLUG BAM:
    Salivation/ Secretions/ Sweating
    Lacrimation
    Urination
    Gastrointestinal upset
    Bradycardia/ Bronchoconstriction/ Bowel movement
    Abdominal cramps/ Anorexia
    Miosis

    Phenytoin: adverse effects PHENYTOIN:
    P-450 interactions
    Hirsutism
    Enlarged gums
    Nystagmus
    Yellow-browning of skin
    Teratogenicity
    Osteomalacia
    Interference with B12 metabolism (hence anemia)
    Neuropathies: vertigo, ataxia, headache

    Gynaecomastia-causing drugs DISCOS:
    Digoxin
    Isoniazid
    Spironolactone
    Cimetidine
    Oestrogens
    Stilboestrol

    Hypertension: treatment ABCD:
    ACE inhibitors/ AngII antagonists (sometimes Alpha agonistsalso)
    Beta blockers
    Calcium antagonists
    Diuretics (sometimes vasoDilators also)

    Diuretics classification in order of site of action "COLTPee:"
    · In their sequential site of action along the nephron:
    Carbonic anhydrase inhibitors (at the proximal tubule)
    Osmotic diuretics (at the Loop of Henle)
    Loop diuretics (at the ascending loop)
    Thiazides (at the distal tubule)
    Potassium-sparing diuretics (at the collecting tubules)
    · Diuretics make patient pee like a horse, hence "Colt Pee".

    Aspirin: side effects ASPIRIN:
    Asthma
    Salicyalism
    Peptic ulcer disease/ Phosphorylation-oxidation uncoupling/ PPH/
    Platelet disaggregation/ Premature closure of PDA
    Intestinal blood loss
    Reye's syndrome
    Idiosyncracy
    Noise (tinnitus)

    Clopidogrel: use CLOPIdogrel is a drug that preventsCLots, an Oral Platelet Inhibitor (OPI).

    Teratogenic drugs: major non-antibiotics TAP CAP:
    Thalidomide
    Androgens
    Progestins
    Corticosteroids
    Aspirin & indomethacin
    Phenytoin

    Physostigmine vs. neostigmine LMNOP:
    Lipid soluble
    Miotic
    Natural
    Orally absorbed well
    Physostigmine
    · Neostigmine, on the contrary, is:Water soluble
    Used in myesthenia gravis
    Synthetic
    Poor oral absorption


    Prazocin usage Prazocin sounds like an acronym of "praszzzour urine".
    Therefore Prazocin used for urinary retention in BPH.

    Steroid side effects CUSHINGOID:
    Cataracts
    Ulcers
    Skin: striae, thinning, bruising
    Hypertension/ Hirsutism/ Hyperglycemia
    Infections
    Necrosis, avascular necrosis of the femoral head
    Glycosuria
    Osteoporosis, obesity
    Immunosuppression
    Diabetes

    Beta blockers with CYP2D6 polymorphic metabolism "I MetTim Carver, the metabolic polymorph":
    · The following beta blockers require dose adjustment due to CYP2D6 polymorphicmetabolism:
    Metoprolol
    Timolol
    Carvedilol(in patients with lower or higher than normal CYP2D6 activity)

    Beta blockers with intrinsic sympathomimetic activity
    Picture diabetic and asthmatic kids riding away on a cartthat rolls on pinwheels.
    Pindolol and Carteolol have high and moderate ISA respectively,making them acceptable for use in some diabetics or asthmatics despite the factthat they are non-seletive beta blockers.

    Amiodarone: action, side effects 6 P's:
    Prolongs action potential duration
    Photosensitivity
    Pigmentation of skin
    Peripheral neuropathy
    Pulmonary alveolitis and fibrosis
    Peripheral conversion of T4 to T3 is inhibited -> hypothyroidism

    Morphine: effects MORPHINES:
    Miosis
    Orthostatic hypotension
    Respiratory depression
    Pain supression
    Histamine release/ Hormonal alterations
    Increased ICT
    Nausea
    Euphoria
    Sedation

    Monoamine oxidase inhibitors: members "PIT ofdespair":
    Phenelzine
    Isocarboxazid
    Tranylcypromine
    · A pit of despair, since MAOs treat depression.

    Antimuscarinics: members, action "Inhibits ParasympatheticAnd Sweat":
    Ipratropium
    Pirenzepine
    Atropine
    Scopolamine
    · Muscarinic receptors at all parasympathetic endings sweat glands insympathetic.

    Patent ductus arteriosus: treatment "Come In and Close the door":
    INdomethacin is used to ClosePDA.

    Etoposide: action, indications, side effect "eTOPoside":
    · Action:
    Inhibits TOPoisomerase II
    · Indications:
    Testicular carcinoma
    Oat cell carcinoma of lung
    Prostate carcinoma
    · Side effect:
    Affects TOP of your head, causing alopecia

    Antibiotics contraindicated during pregnancy MCAT:
    Metronidazole
    Chloramphenicol
    Aminoglycoside
    Tetracycline

    Lithium: side effects LITHIUM:
    Leukocytes Increased (leukocytosis)
    Tremors
    Hypothyroidism
    Increased Urine
    Moms beware (teratogenic)

    Quinolones [and Fluoroquinolones]: mechanism "Topplethe Queen":
    Quinolone interferes with Topoisomerase II.

    MPTP: mechanism, effect MPTP:
    Mitochondrial Parkinson's-Type Poison.
    · A mitochondrial poison that elicits a Parkinson's-type effect.

    Osmotic diuretics: members GUM:
    Glycerol
    Urea
    Mannitol

    Sulfonamide: major side effects · Sulfonamide sideeffects:
    Steven-Johnson syndrome
    Skin rash
    Solubility low (causes crystalluria)
    Serum albumin displaced (causes newborn kernicterus and potentiation ofother serum albumin-binders like warfarin)

    Benzodiazepenes: antidote "Ben is off with theflu":
    Benzodiazepine effects off with Flumazenil.

    Narcotics: side effects "SCRAM if you see a drugdealer":
    Synergistic CNS depression with other drugs
    Constipation
    Respiratory depression
    Addiction
    Miosis

    Sex hormone drugs: male "Feminine Males NeedTestosterone":
    Fluoxymesterone
    Methyltestosterone
    Nandrolone
    Testosterone

    Ca++ channel blockers: uses CA++ MASH:
    Cerebral vasospasm/ CHF
    Angina
    Migranes
    Atrial flutter, fibrillation
    Supraventricular tachycardia
    Hypertension
    · Alternatively: "CHASM":
    Cererbral vasospasm / CHF
    Hypertension
    Angina
    Suprventricular tachyarrhythmia
    Migranes

    Benzodiazepenes: drugs which decrease their metabolism "I'mOverly Calm":
    Isoniazid
    Oral contraceptive pills
    Cimetidine
    · These drugs increase calming effect of BZDs by retarding metabolism.

    Tetracycline: teratogenicity TEtracycline is aTEratogen that causes staining ofTEeth in the newborn.

    Warfarin: metabolism SLOW:
    · Has a slow onset of action.
    · A quicK Vitamin K antagonist, though.
    Small lipid-soluble molecule
    Liver: site of action
    Oral route of administration.
    Warfarin

    Myasthenia gravis: edrophonium vs. pyridostigmine eDrophoniumis for Diagnosis.
    pyRIDostigmine is to get RIDof symptoms.

    Narcotic antagonists The Narcotic Antagonistsare NAloxone and NAltrexone.
    · Important clinically to treat narcotic overdose.

    Inhalation anesthetics SHINE:
    Sevoflurane
    Halothane
    Isoflurane
    Nitrous oxide
    Enflurane
    · If want the defunct Methoxyflurane too, make it MoonSHINE.

    Therapeutic dosage: toxicity values for most commonly monitoredmedications "The magic 2s":
    Digitalis (.5-1.5) Toxicity = 2.
    Lithium (.6-1.2) Toxicity = 2.
    Theophylline (10-20) Toxicity = 20.
    Dilantin (10-20) Toxicity = 20.
    APAP (1-30) Toxicity = 200.

    Opioids: effects BAD AMERICANS:
    Bradycardia & hypotension
    Anorexia
    Diminished pupilary size
    Analgesics
    Miosis
    Euphoria
    Respiratory depression
    Increased smooth muscle activity (biliary tract constriction)
    Constipation
    Ameliorate cough reflex
    Nausea and vomiting
    Sedations

    Delerium-causing drugs ACUTE CHANGE IN MS:
    Antibiotics (biaxin, penicillin, ciprofloxacin)
    Cardiac drugs (digoxin, lidocaine)
    Urinary incontinence drugs (anticholinergics)
    Theophylline
    Ethanol
    Corticosteroids
    H2 blockers
    Antiparkinsonian drugs
    Narcotics (esp. mepridine)
    Geriatric psychiatric drugs
    ENT drugs
    Insomnia drugs
    NSAIDs (eg indomethacin, naproxin)
    Muscle relaxants
    Seizure medicines

    Disulfiram-like reaction inducing drugs "PM PMT" asin Pre Medical Test in the PM:
    Procarbazine
    Metronidazole
    Cefo (Perazone, Mandole, Tetan).

    Zafirlukast, Montelukast, Cinalukast: mechanism, usage "Zafir-luk-ast,Monte-luk-ast, Cina-luk-ast":
    · Anti-Lukotrienes for Asthma.
    · Dazzle your oral examiner: Zafirlukast antagonizes leukotriene-4.

    4-Aminopyradine (4-AP) use "4-AP is For AP":
    For AP (action potential) propagation in Multiple Sclerosis.

    Direct sympathomimetic catecholamines DINED:
    Dopamine
    Isoproterenol
    Norepinephrine
    Epinephrine
    Dobutamine

    Vir-named drugs: use "-vir at start, middle or endmeans for virus":
    · Drugs: Abacavir, Acyclovir, Amprenavir, Cidofovir,
    Denavir, Efavirenz, Indavir, Invirase, Famvir,
    Ganciclovir, Norvir, Oseltamivir, Penciclovir,
    Ritonavir, Saquinavir, ValacyclovirViracept, 
    Vir
    amune, Zanamivir, Zovirax.

    Nitrofurantoin: major side effects NitroFurAntoin:
    Neuropathy (peripheral neuropathy)
    Fibrosis (pulmonary fibrosis)
    Anemia (hemolytic anemia)

    Steroids: side effects BECLOMETHASONE:
    Buffalo hump
    Easy bruising
    Cataracts
    Larger appetite
    Obesity
    Moonface
    Euphoria
    Thin arms & legs
    Hypertension/ Hyperglycaemia
    Avascular necrosis of femoral head
    Skin thinning
    Osteoporosis
    Negative nitrogen balance
    Emotional liability

    Methyldopa: side effects METHYLDOPA:
    Mental retardation
    Electrolyte imbalance
    Tolerance
    Headache/ Hepatotoxicity
    psYcological upset
    Lactation in female
    Dry mouth
    Oedema
    Parkinsonism
    Anaemia (haemolytic)

    Sodium valproate: side effects VALPROATE:
    Vomiting
    Alopecia
    Liver toxicity
    Pancreatitis/ Pancytopenia
    Retention of fats (weight gain)
    Oedema (peripheral oedema)
    Appetite increase
    Tremor
    Enzyme inducer (liver)

    Captopril (an ACE inhibitor): side effects CAPTOPRIL:
    Cough
    Angioedema/ Agranulocystosis
    Proteinuria/ Potassium excess
    Taste changes
    Orthostatic hypotension
    Pregnancy contraindication/ Pancreatitis/ Pressure drop(first dose hypertension)
    Renal failure (and renal artery stenosis contraindication)/ Rash
    Indomethacin inhibition
    Leukopenia/ Liver toxicity

    Lead poisoning: presentation ABCDEFG:
    Anemia
    Basophilic stripping
    Colicky pain
    Diarrhea
    Encephalopathy
    Foot drop
    Gum (lead line)

    Beta-blockers: main contraindications, cautions ABCDE:
    Asthma
    Block (heart block)
    COPD
    Diabetes mellitus
    Electrolyte (hyperkalemia)

    Lupus: drugs inducing it HIP:
    Hydralazine
    INH
    Procanimide

    Lithium: side effects LITH:
    Leukocytosis
    Insipidus [diabetes insipidus, tied to polyuria]
    Tremor/ Teratogenesis
    Hypothyroidism

    SSRIs: side effects SSRI:
    Serotonin syndrome
    Stimulate CNS
    Reproductive disfunctions in male
    Insomnia

    Metabolism enzyme inducers "Randy's Black CarGoes Putt Putt and Smokes":
    Rifampin
    Barbiturates
    Carbamazepine
    Grisoefulvin
    Phenytoin
    Phenobarb
    Smokingcigarettes

    Phenobarbitone: side effects Children are annoying (hyperkinesia,irritability, insomnia, aggression).
    Adults are dosy (sedation, dizziness, drowsiness).

    Cholinergics (eg organophosphates): effects If you knowthese, you will be "LESS DUMB":
    Lacrimation
    Excitation of nicotinic synapses
    Salivation
    Sweating
    Diarrhea
    Urination
    Micturition
    Bronchoconstriction

    Routes of entry: most rapid ways meds/toxins enter body "Stickit, Sniff it, Suck it, Soak it":
    Stick = Injection
    Sniff = inhalation
    Suck = ingestion
    Soak = absorption

    Depression: 5 drugs causing it PROMS:
    Propranolol
    Reserpine
    Oral contraceptives
    Methyldopa
    Steroids

    Hepatic necrosis: drugs causing focal to massive necrosis "VeryAngry Hepatocytes":
    Valproic acid
    Acetaminophen
    Halothane

    Warfarin: action, monitoring WePT:
    Warfarin works on the extrinsic pathway and is monitored by PT.

    Beta-blockers: side effects "BBC Loses Viewers
    IRochedale":
    Bradycardia
    Bronchoconstriction
    Claudication
    Lipids
    Vivid dreams & nightmares
    -ve Inotropic action
    Reduced sensitivity to hypoglycaemia

    Zero order kinetics drugs (most common ones) "PEAZ
    (sounds like pees) out a constant amount":
    Phenytoin
    Ethanol
    Aspirin
    Zero order
    · Someone that pees out a constant amount describes zero order kinetics (alwaysthe same amount out)

    Benzodiazepines: actions "Ben SCAMs Pam intoseduction not by brain but by muscle":
    Sedation
    anti-Convulsant
    anti-Anxiety
    Muscle relaxant
    Not by brain: No antipsychotic activity.

    Beta-1 vs Beta-2 receptor location "You have 1 heartand 2 lungs":
    Beta-1 are therefore primarily on heart.
    Beta-2 primarily on lungs.

    Cisplatin: major side effect, action "Ci-Splat-In":
    Major side effect: Splat (vomiting sound)--vomiting so severe thatanti-nausea drug needed.
    Action: Goes Into the DNA strand.

    Pupils in overdose: morphine vs. amphetamine "MorPHINE:
    Fine. AmPHETamine: Fat":
    Morphine overdose: pupils constricted (fine).
    Amphetamine overdose: pupils dilated (fat).

    Atropine use: tachycardia or bradycardia "A goes withB":
    Atropine used clinically to treat Bradycardia.

    Reserpine action Reserpine depletes the 
    Reser
    ves of catecholamines [and serotonin].

    Botulism toxin: action, related bungarotoxin Action: "BotulismBottles up the Ach so it can't be the released":
    Related bungarotoxin: "Botulism is related to Beta Bungarotoxin
    (beta-, not alpha-bungarotoxin--alpha has different mechanism).

    Ipratropium: action Atropine is buried in the middle:
    iprAtropium, so it behaves like Atropine.

    Bleomycin: action "Bleo-Mycin BlowMy DNA to bits":
    Bleomycin works by fragmenting DNA (blowing it to bits).
    MyDNA signals that its used for cancer (targeting self cells).

    Propranolol and related '-olol' drugs: usage "olol"is just two backwards lower case b's.
    Backward b's stand for "beta blocker".
    · Beta blockers include acebutolol, betaxolol, bisoprolol,oxprenolol, propranolol.

    Succinylcholine: action, use Succinylcholine gets 
    Stuck
     to Ach receptor, then Sucks ions in through open pore.
    You Suck stuff in through a mouth-tube, and drug is used for intubation.


    Monday, 20 March 2017

    Introduction to Infrared Spectroscopy


    Introduction to Infrared Spectroscopy

    Chapter 16 Instrumental Analysis

    Definition of Infrared

    Spectroscopy
    w The absorption of light, as it passes through a medium, varies linearly with the distance the light travels and with concentration of the absorbing medium.  Where a is the absorbance, the Greek lower-case letter epsilon is a characteristic constant for each material at a given wavelength (known as the extinction coefficient or absorption coefficient), c is concentration, and l is the length of the light path, the absorption of light may be expressed by the simple equation a= epsilon times c times l.

    Infrared Spectroscopy

    w  Infrared spectroscopy is the measurement of the wavelength and intensity of the absorption of mid-infrared light by a sample. Mid-infrared is energetic enough to excite molecular vibrations to higher energy levels.
    w  The wavelength of infrared absorption bands is characteristic of specific types of chemical bonds, and infrared spectroscopy finds its greatest utility for identification of organic and organometallic molecules. The high selectivity of the method makes the estimation of an analyte in a complex matrix possible.

    Example of IR


    Theory of Infrared Absorption
    Spectroscopy
    w  For a molecule to absorb IR, the vibrations or rotations within a molecule must cause a net change in the dipole moment of the molecule. The alternating electrical field of the radiation (remember that electromagnetic radiation consists of an oscillating electrical field and an oscillating magnetic field, perpendicular to each other) interacts with fluctuations in the dipole moment of the molecule.
    w  If the frequency of the radiation matches the vibrational frequency of the molecule then radiation will be absorbed, causing a change in the amplitude of molecular vibration.

    Molecular Rotations

    w  Rotational transitions are of little use to the spectroscopist. Rotational levels are quantized, and absorption of IR by gases yields line spectra.
    w  However, in liquids or solids, these lines broaden into a continuum due to molecular collisions and other interactions.
    Molecular Rotations (cont)
    ,   

    Vibrational-Rotational

    Transitions
    w  In general, a molecule which is an excited vibrational state will have rotational energy and can lose energy in a transition which alters both the vibrational and rotational energy content of the molecule.
    w  The total energy content of the molecule is given by the sum of the vibrational and rotational energies. For a molecule in a specific vibrational and rotational state, denoted by the pair of quantum numbers (v, J), we can write its energy as: E(v, J)=Evib(v) + Erot(J)

    Transitions (cont)

    w  The energies of these three transitions form a very distinctive pattern. If we consider the lower vibrational state to be the initial state, then we can label the absorption lines as follows.
    w  Transitions for which the J quantum number decreases by 1 are called P-branch transitions, those which increase by 1 are called R-branch transitions and those which are unchanged are called Q-branch transitions.

    Molecular Vibrations

    w   In order to predict equilibrium stable-isotope fractionations, it is necessary to know the characteristic frequencies of molecular vibrations. It is also necessary to know how much each vibrational frequency in a molecule changes when a heavy isotope is substituted for a light one. Vibrational frequencies for isotopically substituted molecules are not always known, so it is often necessary to use some type of force-field model to predict them.
    w   Molecular vibrations are also important in understanding infrared absorption and the mechanisms and kinetics of chemical
    reactions. Frequencies are most commonly measured with infrared or Raman spectroscopy. Rotational-vibrational spectroscopy, isotope substitution, and many forms of force-field modeling are used to determine characteristic atomic motions.

    Vibrational Motion

    w  Subdivided into so-called normal modes of vibration which rapidly increase with the number of atoms in the molecule. Each of these normal vibrational modes contributes RT to the average molar energy of the substance and is a primary reason why heat capacities increase with molecular complexity.
    w  If there are Xvib modes of vibration, then the vibrational energy contributes Xvib(RT) to the average molar energy of the substance.

    Stretching and Bending

    Stretching Vibrations


    Bending Vibrations


    Quantum Treatment of

    Vibrations
    w  Transitions in vibrational energy levels can be brought about by absorption of radiation, provided the energy of the radiation exactly matches the difference in energy levels between the vibrational quantum states and provided also that the vibration causes a fluctuation in dipole.
    w  Infrared measurements permit the evaluation of the force constants for various types of chemical bonds.

    Infrared Instruments

    w  An infrared spectrophotometer is an instrument that passes infrared light through an organic molecule and produces a spectrum that contains a plot of the amount of light transmitted on the vertical axis against the wavelength of infrared radiation on the horizontal axis. In infrared spectra the absorption peaks point downward because the vertical axis is the percentage transmittance of the radiation through the sample.
    w  Absorption of radiation lowers the percentage transmittance value. Since all bonds in an organic molecule interact with infrared radiation, IR spectra provide a considerable amount of structural data.


    References
    w   http://www.cas.org
    w   http://www.chemcenter/org
    w   http://www.shu.ac.uk/schools/sci/chem/tutorials/molspec/irspec/.htm