pharm exam 4 Flashcards
what is the progestin in the vaginal ring and in the subdermal implant preparations?
etonogestrel
the 3 antianginal classes?
organic nitrates, calcium channel blockers, beta blockers
the 2 organic nitrates?
NTG, isosorbide dinitrate
organic nitrate MOA
prodrug converted to NO by ALDH2. NO produces venous dilation in VSM. this reduces preload.
what “load” does nitroglycerin decrease?
PREload
adverse effects of nitroglycerin?
headache (can be severe), facial flushing, orthostatic HTN, reflex tachycardia
drug interactions of organic nitrates?
vasodilator drugs for ED and with alcohol
how does isosorbide dinitrate compare to NTG?
longer duration of action so can be added if angina is not controlled by NTG & Beta blockers or CCBs
the 3 calcium channel blockers..
nifedipine, verapamil, diltiazem
what “load” do the calcium channel blockers decrease?
AFTERload
Calcium channel blockers MOA
bind alpha1 and block inward flow of calcium through voltage gated L type calcium channels which dilates coronary arteries and decreases afterload
point of efficacy for calcium channel blockers
prophylaxis against angina attacks to reduce consumption of NTG
where is nifedipine’s greatest inhibitory action?
VSM! not heart
verapamil and diltiazem act to
decrease HR and contractility
which is preferred: verapamil or diltiazem?
diltiazem! it produces less cardiac depression than verapamil and is better tolerated by most patients