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Pharma General
General Pharmacology
| Question | Answer |
|---|---|
| Ability of drug to cross biologic membranes and enter blood = | Absorption |
| Estimation of extent of spread of total drugs throughout the body = | Distribution |
| Process of chemical alteration of drug molecules = | Metabolism. Primary purpose is to inactivate drugs & increase water solubility to enhance renal elimination |
| Removal of a drug and its metabolites from the body = | Excretion (kidneys, lungs, sweat breast milk) |
| Direct muscarinic agents MOA | Mimic parasympathetic effects: decrease intraocular pressure, constrict pupils, lower HR; bronchoconstriction; increase GI smooth mx tone |
| Muscarinic AEs | Bradycardia, diarrhea, N/V, incontinence, blurred vision |
| Indirect muscarinic agents (eg, ACH inhibitors): uses | Alzheimer (donepezil, galantamine). MG (pridostigmine). Nerve agent antidotes (-stigmine). |
| Muscarinic antagonists examples | Ipratropium. Atropine for brady. Scopolamine. Tolteridine & oxybutynin for incontinence. |
| Types of adrenergic agents | Catecholamines, alpha and beta agonists. |
| Alpha-1 receptor agonists: MOA and examples | Vasoconstriction, mydriasis, relief of nasal congestion. Midodrine (ortho hotn). Phenylephrine, epinephrine |
| Catecholamines: MOA and examples | Norepinephrine (Levophed). Dopamine (Intropin) |
| Alpha-2 receptor agonists: MOA and examples | Decrease CNS adrenergic activity => decrease HR / BP. Clonidine (HTN). Methyldopa (HTN, AIHA) |
| Miscellaneous alpha agonists: MOA and examples | Oxymetazoline (alpha 1&2). Neosynephrine. Pseudoephedrine. Methylphenidate. |
| Alpha-1 receptor antagonists: MOA and examples | Vasodilation, relax prostate & bladder neck. Prazosin, terazosin, doxazosin, tamsulosin. |
| Beta-1 receptor agonists: MOA and examples | Stimulate cardiac/renal beta receptors => positive inotrope (increase CO) & renin release. Tx CHF. Dopamine, dobutamine |
| Beta-2 receptor agonists: MOA and examples | Bronchodilation; relaxation of uterus. Terbutaline (delay premature labor). Albuterol. Salmeterol |
| Miscellaneous beta agonists: MOA and examples | Isoproterenol: stimulates beta 1&2. Tx bradyarrhythmias / cardiac shock |
| Beta receptor antagonists: MOA | Decreased CO, HR, contractility, renin secretion, decreased vasoconstriction. Increased Na / H2O retention, cardiac remodeling. |
| Beta blocker examples | Nonselective: propranolol, timolol. Selective: metoprolol, atenolol. Other: labetolol, carvedilol |