Which drug is used topically in ophthalmology to induce mydriasis without causing cycloplegia?
Show answer and explanation
Correct answer: Phenylephrine
Phenylephrine stimulates Alpha-1 receptors on the radial dilator muscle of the iris. Unlike antimuscarinics, it does not affect the ciliary muscle, so accommodation (cycloplegia) is spared.
Keep practicing
More Adrenergic Agonists questions
- Fenoldopam is a selective agonist at which receptor, used for the treatment of hypertensive emergencies?
- What is the primary mechanism of action of Cocaine in the autonomic nervous system?
- Which of the following adrenergic agonists is used to delay preterm labor (tocolysis) by relaxing uterine smooth muscle?
- In the presence of an Alpha-blocker, the administration of Epinephrine causes a decrease in blood pressure rather than an increase. This ph…
- Which drug is a prodrug converted to desglymidodrine, used for the treatment of symptomatic orthostatic hypotension?
- Salmeterol and Formoterol are unique among Beta-2 agonists because they: