This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
A 42 year old man, hypeensive, is having symptoms of increased intraocular pressure. Which of the following agent is NOT used in this patient? 
Select and explain. 
A. Dipivefrin, B. Beta blockers, C. Alpha agonist, D. Trabeculoplasty
C: Alpha agonist
Answer: C: Alpha agonist 
Explanation: Alpha agonist cannot he used in hypeensive patients because alpha receptors cause vascular smooth muscle contraction which leads to fuher increase in blood pressure. Systemic side effects of sympathomimetic drugs include, Hypeension Tachycardia Headache Palpitation Tremors Nervousness Anxiety Ref: Comprehensive Ophthalmology by AK Khurana, 4th edition, Page 225.