Labetalol is an: (A) Alpha 1 blocker, (B) Alpha 2 blocker, (C) Alpha 1 and selective beta 1 blocker, (D) Alpha 1 and non-selective beta blocker
Answer is D. Labetalol is a commonly used a 1 and non-selective b-adrenergic blockerDose: 200-2400mg/day, orally in two to three divided dosesIn an emergency: 20mg IV, followed by 20-80mg every 20min to a maximum of 220mg. Avoid in patients with Asthma, congestive cardiac failure, Liver failure(Ref: William's Obstetrics; 25th edition)