When taking medication, you may experience nausea and retching because of difficulty swallowing. To relieve this uncomfortable feeling, you can try the following methods. For example, try eating light foods, such as crackers. Small amounts of crackers can reduce the feeling of nausea and can help absorb stomach acid. Or eat mints and chew gum to kick-start the bowel function and help reduce nausea. You can also drink ginger tea to reduce nausea. Or you can also take medications such as cyproheptadine or enteritisin to treat nausea, upset stomach and vomiting.