Answer to Question 1
This is a nasogastric tube placed in the stomach and connected to low suction for the purpose of evacuating the stomach. The suction is very low but strong enough to prevent a fluid build-up in the stomach.
Answer to Question 2
nitroglycerin: nausea, vomiting; adverse reactions include orthostatic hypotension
phenobarbital (Barbita): nausea, vomiting; adverse reactions include drowsiness, lethargy, hangover
morphine sulfate: nausea, vomiting, constipation, ileus; adverse reactions include respiratory depression.