Q- Drug-to-drug interaction based on absorption, transformation, distribution and excretion is considered which one of the following types of interaction?
A- Chemical interaction
B- Pharmaceutical interaction
C- Pharmacodynamic interaction
D- Pharmacokinetic interaction
D- Pharmacokinetic interaction- Pharmacokinetics of a drug is related to the drug’s absorption, transformation, distribution and excretion while pharmacodynamics deals with receptors, cells, enzymes and organs.
Q- The effect of medications on parasympathetic function declines slowly in which one of the following organs?
A- Eye
B- Glands
C- Heart
D- Smooth muscles
A- Eye- It is clear that the effect of drugs such as atropine on parasympathetic receptors declines very slowly on the eye more than other organs.
Q- Which one of the following antihypertensive medications is directly acting vasodilator?
A- Clonidine
B- Enalapril
C- Labetalol
D- Nifedipine
D- Nifedipine- It is a calcium-channel blocker that affects the blood vessels directly and leads to vasodilation. The other drugs act indirectly through receptors.
