nausea/vomiting
"This is an excellent anti-nausea medication no matter why you are nauseated, usually. If you are taking the maximum  dosage and are still nauseated something is wrong. Get to the ER. This happened several times to me last year. Promethazine   strong antibiotics and I'd get better for a month. Finally an ER doctor did a CAT scan and saw that I was having appendicitis but hurting in the 'wrong' place. Just a warning if this great medicine fails you."