Problem 1
A woman with facial muscle spasms is treated with an agent that inhibits the release of acetylcholine. Which side effect is most likely to occur in this patient? (A) bradycardia (B) urinary incontinence (C) dry mouth (D) diarrhea (E) constriction of the pupils
Problem 2
A man complains of dry mouth after radiation therapy for throat cancer, and he is treated with cevimeline. Which mechanism produces the therapeutic effect of this drug? (A) activation of muscarinic \(M_2\) receptors (B) increased formation of \(\mathrm{IP}_3\) (C) increased cAMP levels (D) increased cGMP levels (E) increased potassium efflux
Problem 4
A man receives a drug that increases cGMP levels. Which adverse effect is most likely to result from this medication? (A) constipation (B) cough (C) dry mouth (D) sedation (E) headache
