A male patient aged 52 yrs was stung by three honey bees, in 10 minutes he developed breathlessness and was taken to casualty. The patient was found to be in anaphylactic shock and the medical team tried to reverse the bronchoconstriction & hypotension using adrenaline. Adrenaline was not found to be curing his condition. His wife told the CMO that he has been taking some medicines for BP but she could name the medicines.

Which antihypertensive was he likely to be consuming that could have prevented the effects of adrenaline? Doxazocin Propranolol Metoprolol Acebutolol.