Several Classes of Drugs Have Interactions with Cholinergic Blockers

Multiple Choice

Several classes of drugs have interactions with cholinergic blockers. Which of the following is true about these interactions?

A) Drugs with a narrow therapeutic range given orally may not stay in the GI tract long enough to produce an action.
B) Additive antimuscarinic effects may occur with antihistamines.
C) Cholinergic blockers may decrease the sedative effects of hypnotics.
D) Cholinergic blockers are contraindicated with antipsychotics.