The only drug whose over dosage is not characterized by both hypotension and bradycardia is:: (A) Propanolol, (B) Verapamil, (C) Clonidine, (D) Theophylline
Answer is D. Theophylline results in reflex tachycardia due to its vasodilatory action. Propanolol, verapamil and clonidine cause hypotension as well as bradycardia.