Pharm-Fast Review Flashcards
The “-azosin”’s belong to which class of drugs?
Alpha blockers
What is the moa for alpha blockers?
Block a1 receptor on arterioles and venues. Normally, activation of the a1 receptor increases production of DAG and IP3 leading to increased Ca++ intracellularly
What are the major ADEs found with alpha blockers?
Orthostatic hypotension-1st dose,
syncope, sinus-tach, and vertigo
What is phenoxybenzamine’s moa?
Noncompetitive a1 and a2 antagonist
What is phentolamine’s moa?
Competitive a1 and a2 antagonist
The “-olols” belong to which class of drugs?
The Beta Blockers
What is the MOA for the BBs?
Block post synaptic B receptor found on heart and skeletal muscle.
What properties are important concerning the BBs?
Membrane stabilizing activity, ISA, lipid solubility and plasma half life
What ADEs are associated with BB?
CV disturbances ( such as CHF, bradycardia, cold extremities), impotence, sleep disturbances, sedation, asthma
What drugs belong to the alpha2 agonist class?
Clonidine and methyldopa
What’s the MOA for a2 agonists?
Decrease sympathetic outflow by stimulating CNS receptors
What are the ADE’s of clonidine?
Rebound HTN, dry mouth, sedation, bradyarrhythmias
What are methyldopa’s ADEs?
Sedation, ✚ Coombs test; pro-drug converted to α-methyl NE
What two drugs belong to the Post- ganglionic sympathetic terminal blockers drug class?
Reserpine and Guanethidine (discontinued in US)
What’s the MOA for reserpine?
Destroys adrenergic synaptic vesicles, thereby depleting NE and decreasing release
What are the ADEs associated with Reserpine?
Rarely used; depression, sedation, dry mouth, edema, bradycardia, night terrors
What drugs are Ganglionic blockers?
Trimethaphan, mecamylamine, and hexamethonium
What’s the MOA for the Ganglionic blockers?
Compete with Ach for ganglionic nicotinic receptor (Nn) that block the opening of the Na/K channels and thus inhibit post-ganglionic sympathetic neurons
What’s significant about the Ganglionic blockers ADEs?
They have side effects from blocking both sympathetics and parasympathetics
What are the ADEs found with Ganglionic blockers?
Postural hypotension, tachycardia, arrhythmias, blurred vision, double vision, asthma, dry mouth, constipation, paralytic ileus, urinary retention, impotence, drowsiness, seizures, hallucinations, tremors, and confusion
What drugs belong to the Ca++ channel blockers class?
Drugs ending in “-pine” and Diltiazem and Verapamil
What are the “pines” MOA?
Block L-type Ca++ channels in smooth muscle
What are Diltiazem and Verapamil’s MOA?
Block L-type Ca++ channels in CARDIAC & smooth muscle
What ADEs are associated with the CCBs?
Constipation, edema, headache, bradycardia, GI disturbancies, dizziness, AV block, tachycardia (nifedipine)
What two drugs act directly through NO?
Hydralazine and nitroprusside
What is the MOA for hydrazine and nitroprusside?
Release endothelial NO, which stimulates guanylate cyclase which increases cGMP