Which category of medication will least likely cause dry eye?

Which category of medication will least likely cause dry eye?

• A. Anti-Histamine
• B. Antibiotics
• C. Anti-Anxiety
• D. Antidepressants

Answer: (B)

Medications can cause dry eye primarily when they reduce tear production or alter the tear film, often through anticholinergic effects. Antihistamines commonly dry the eye because they block muscarinic receptors and decrease lacrimal secretion, leading to a drier surface. Antidepressants, especially older ones with strong anticholinergic properties, can also reduce tear production, and some anti-anxiety medications have similar autonomic effects that can contribute to dryness. In contrast, antibiotics do not typically suppress tear production or destabilize the tear film in most cases; systemic antibiotics aren’t a common cause of dry eye, and topical antibiotics, if anything, can irritate the surface but don’t generally create a dry-eye state. So antibiotics are least likely to cause dry eye among the options.

Medications can cause dry eye primarily when they reduce tear production or alter the tear film, often through anticholinergic effects. Antihistamines commonly dry the eye because they block muscarinic receptors and decrease lacrimal secretion, leading to a drier surface. Antidepressants, especially older ones with strong anticholinergic properties, can also reduce tear production, and some anti-anxiety medications have similar autonomic effects that can contribute to dryness. In contrast, antibiotics do not typically suppress tear production or destabilize the tear film in most cases; systemic antibiotics aren’t a common cause of dry eye, and topical antibiotics, if anything, can irritate the surface but don’t generally create a dry-eye state. So antibiotics are least likely to cause dry eye among the options.