Severe or continuing nausea, vomiting, or diarrhea that does not stop which may cause patient to lose too much water & may lead to low BP. Concomitant use w/ medicines, supplements, or salt substitutes that contain K; medicines for appetite control, asthma, colds, cough, hay fever, or sinus problems, & herbal or vit supplements. Avoid alcoholic beverages. Dizziness or lightheadedness may occur after 1st dose especially if patient has been taking diuretic. May affect ability to drive, use machines, or to do anything else that could be dangerous if patient is dizzy or not alert. Use effective form of birth control to keep from getting pregnant.