Asterisk Flashcards
Time it takes for amount of drug to fall to half of its value, constant in first order kinetics (majority of drugs)
Half-life (T1/2)
Barbiturates, phenytoin, carbamazepine, and rifampin all do this
Induce CYP450
Cimetidine, ketoconazole, isoniazid, and grapefruit all do this
Inhibit CYP450
Ability of drug to produce the maximal biologic effect
Efficacy
Mechanism of action (MOA) utilizes intracellular receptors
Steroid and hormones
Mechanism of action (MOA) utilizes transmembrane receptors that have intrinsic enzymatic activity
Insulin, EGF, TGFbeta, PDGF, ANP
Antidote used for acetaminophen (APAP) toxicity
N-acetylcysteine
Antidote used for warfarin toxicity
Vitamin K and Fresh frozen plasma (FFP)
Antidote used for opioid toxicity
Naloxone (IV), naltrexone (PO)
Antidote used for benzodiazepine toxicity
Flumazenil
May protect against doxorubicin cardio-toxicity by chelating iron
Dexrazoxane
Blows DNA (breaks DNA strands), limiting SE in pulmonary fibrosis
Bleomycin
Anti-emetics used in association with anti-cancer drugs that are 5-HT3 (serotonin receptor subtype ) antagonist
Odansetron, granisetron, dolasetron, palonosetron
Hormone inhibiting prolactin release
Dopamine
Synthetic analog of ADH hormone used for diabetes insipidus and nocturnal enuresis
Desmopressin (DDAVP)
Thioamide less likely to cross placenta, inhibits peripheral conversion of T4 to T3 in high doses, and indicated for pregnant women in 1st trimester
Propylthiouracil (PTU)
Propylthiouracil (PTU) mechanism of action
Inhibits thyroid peroxidase
Some side effects of corticosteroids
Hyperglycemia, Osteopenia, impaired wound healing, inc. risk of infection, inc. appetite, HTN, edema, PUD, euphoria, psychosis
Diuretic used to antagonize aldosterone receptors
Spironolactone
Non-steroidal estrogen agonist causes clear cell adenocarcinoma of the vagina in daughters of women who used it during pregnancy
Diethylstilbestrol (DES)
Converted to more active form DHT by 5 alpha-reductase
Testosterone
Product of proinsulin cleavage used to assess insulin production
C-peptide
Long acting insulin
NPH insulin
Amino acid derivative for treatment of Type II diabetes
Nateglinide
Used intranasally and decreases bone resorption
Calcitonin (salmon prep)
Drug that causes contraction of the uterus
Oxytocin
Distribution of histamine receptors H1, H2, and H3
Smooth muscle and mast cells; stomach, heart, and mast cells; nerve endings, CNS respectively
2nd generation antihistamines
Fexofenadine, loratadine, and cetirizine
H2 blocker that causes the most interactions with other drugs
Cimetidine
Ergot alkaloid used as an illicit drug
LSD
Dopamine agonist used in hyperprolactinemia
Bromocriptine
Mediator of tissue pain, edema, inactivated by ACE, and may be a contributing factor to the development of angioedema
Bradykinin
Drug causing depletion of substance P (vasodilator)
Capsaicin
Prostaglandins that cause abortions
Prostaglandin E1 (misoprostol), PGE2, and PGF2alpha
Inhibitor of lipoxygenase
Zileuton
Used in pediatrics to maintain patency of ductus arteriosis
PGE1 (Alprostadil)
Prostaglandin used as 2nd line treatment of erectile dysfunction
PGE1 (Alprostadil)
MOA and effect of nitric oxide
Stimulates cGMP which leads to vascular smooth muscle relaxation
Muscarinic antagonist used in COPD
Ipratropium, tiotropium
MOA action of cromolyn
Blocks opening of Cl channels to prevent mast cell degranulation
SE of long term (>5 days) corticosteroid therapy and remedy
Adrenal suppression and weaning slowly, respectively
Drug used for MRSA
Vancomycin
Meningitis prophylaxis in exposed patients
Rifampin
Technique used to diagnose perianal itching, and the drug used to treat it
Scotch tape technique
and mebendazole
MOA of sulfonamides
Inhibit dihydropteroate synthase
Anemia caused by trimethoprim
Megaloblastic anemia
DOC for giardia, bacterial vaginosis, pseudomembranous colitis, and trichomonas
Metronidazole
Treatment for TB patients (think RIPE)
Rifampin, Isoniazid, Pyrazinamide, and Ethambutol
Common side effect of Rifampin
Orange urine discoloration
DOC for influenza A and B
Oseltamivir or Zanamivir
DOC for RSV
Ribavirin
HIV antiviral class known to have severe drug interactions by causing inhibition of metabolism
Protease inhibitors
DOC for N. gonorrhea
Ceftriaxone
DOC for herpes and its MOA
Acyclovir; activated by viral thymidine kinase, results in inhibition of viral DNA replication
Anti-bacterials that cause hemolysis in G6PD-deficient patients
Sulfonamides
Reason benzos are used cautiously in pregnancy
Ability to cross the placenta
Antidote to benzodiazepine overdose (antagonist that reverses the CNS effects)
Flumazenil
Agent that is metabolized to acetaldehyde by alcohol dehydrogenase and microsomal ethanol-oxidizing system (MEOS)
Ethanol
System that increases in activity with chronic exposure and may contribute to tolerance
Microsomal ethanol oxidizing system MEOS
The most common neurologic abnormality in chronic alcoholics
Peripheral neuropathy (also excessive alcohol use is associated with HTN, anemia, and MI)
Drugs of choice for generalized tonic-clonic and partial seizures
Valproic acid, Phenytoin and Carbamazepine
Drugs of choice for absence seizures
Ethosuximide and valproic acid
Drug of choice for myoclonic seizures
Valproic acid
Anti-seizure drugs used also for pain of neuropathic orgin
Gabapentin
SE of phenytoin
Gingival hyperplasia, nystagmus, diplopia and ataxia
DOC for malignant hyperthermia that may be caused by use of halogenated anesthetics
Dantrolene
Benzodiazepine receptor antagonist, it accelerates recovery from benzodiazepine overdose
Flumazenil
Opioid associated with awareness during surgery and post-operative recall, but still used for high-risk cardiovascular surgeries
Fentanyl
DOC for malignant hyperthermia by acting on the sarcoplasmic reticulum or skeletal muscle
Dantrolene
Antipsychotics, reserpine at high doses, and MPTP (by-product of illicit meperidine analog) and is irreversible
Drug induced Parkinsonism