Final answer:
The preoperative medication that may worsen obstructive sleep apnea (OSA) is Anticholinergics.
Step-by-step explanation:
The correct answer for the question: Which preoperative medication may worsen obstructive sleep apnea (OSA)? is B. Anticholinergics.
Anticholinergics are a class of medications that block the action of acetylcholine, a neurotransmitter that plays a role in muscle contraction. These medications can cause relaxation of the muscles in the airway, leading to obstruction of the upper airway and worsening of obstructive sleep apnea.
For example, some anticholinergic medications that can worsen OSA include certain antihistamines, muscle relaxants, and medications used to treat overactive bladder.