Q- Which one of the following drugs most likely resembles the pharmacologic action of atropine?
A- Hexamethonium
B- Pilocarpine
C- Scopolamine
D- Succinylcholine
C- Scopolamine- Atropine and scopolamine are both anti-muscarinic drugs. It is used in cases of motion sickness and some cases of nausea and vomiting following surgery.
Q- Which of the following agents is used to improve the drug-induced form of Parkinsonism?
A- Bromocriptine
B- Benztropine
C- Dopamine
D- Levodopa
B- Benztropine- Drug-induced form of Parkinsonism occurs as a side effect of some drugs such as anti-psychotics, lithium, metoclopramide and MDMA addiction. Benztropine is the first line of treatment as it reduces the extrapyramidal side effects of these drugs.
Q- Synthesis of which one of the following substances is decreased due to the administration of finasteride in cases of benign prostatic hyperplasia?
A- Dihydrotestosterone
B- Epinephrine
C- Norepinephrine
D- Testosterone
A- Dihydrotestosterone- Finasteride inhibits the enzyme 5- α reductase that converts testosterone into dihydrotestosterone which is responsible for senile prostatic enlargement.
