Ask your visiting nurse or hospital social worker. Drinking plenty of liquids helps keep your mucus thin and easy to cough up. That makes breathing easy and aids in preventing infections. Because of some other medical conditions, some persons should not drink extra liquids. Check with your doctor.
Alcoholic drinks have no food value, but they are high in calories.
Too much alcohol can slow your breathing. Alcohol should never be used with sedatives or tranquilizers. If you eat all the foods you need, extra vitamins aren't needed or helpful. If you do take vitamins, a multivitamin tablet taken once a day is enough. If you need any special vitamins, your doctor will prescribe them.