INDICATIONS angina anxiety atrial fibrillation atrial flutter esophageal varices ethanol withdrawal glaucoma hypertension hypertensive emergency hypotension induction idiopathic hypertrophic subaortic stenosis migraine prophylaxis myocardial infarction prophylaxis myocardial infarction ocular hypertension paroxysmal supraventricular tachycardia perioperative hypertension pheochromocytoma portal hypertension scleroderma renal crisis thyrotoxicosis tremor variceal bleeding prophylaxis ventricular arrhythmias   Side Effects and Adverse Reactions alopecia (highly unpredictable, autoimmune skin disease resulting in the loss of hair on the scalp and elsewhere on the body) angina asthenia (medical term for muscle weakness) AV block bronchospasm cardiac arrest depression diaphoresis (excessive sweating) diarrhea dizziness dyspepsia (means 'bad digestion' and is commonly known as indigestion) dyspnea (significant breathlessness) edema ejaculation dysfunction elevated hepatic enzymes exfoliative dermatitis fatigue hallucinations headache heart failure hepatic necrosis hyperglycemia hypoglycemia hypotension impotence insomnia jaundice lacrimation libido decrease myalgia nausea/vomiting nightmares ocular irritation orthostatic hypotension paresthesias peripheral vasoconstriction peripheral edema pharyngitis priapism pruritus QT prolongation sinus bradycardia skin hyperpigmentation syncope torsade de pointes urinary retention ventricular fibrillation ventricular tachycardia wheezing