<prompt> Antitussive opioid is ?EthylmorphinPethidineMethadoneBuprenorphine  <response>: Ans. is a i.e., Ethylmorphine Antitussives cough center suppressants Opioids : Codeine, ethylmorphine, pholcodeine. Non-opioids : Noscapine, dextro methorphan, chlophedianol. Antihistaminics : Chlorpheniramine, diphenhydromine, promethazine. Peripherally active : Prenoxdiazine. 