Выбрать правильную форму глагола. 1. alcohol has / is having a very negative influence on the action of medicines. 2. these drugs have arrested / are arresting bleeding. 3. the urinalysis confirmed / was confirming the presence of albumin. 4. alcohol usually increases / is increasing the toxicity of barbiturates by more than 50 %. 5. who prescribes / is prescribing the way of drug administration to a patient at the moment?