Side effects are unwanted conditions caused by a drug. These might include, for example, getting a rash from taking penicillin or a headache from taking nitroglycerin. Diuretics can cause side effects and patients should be aware of them and notify their doctor if they experience them. Common side effects of diuretics are:
Weakness
Muscle cramps
Skin rash
Increased sensitivity to sunlight (especially with thiazide diuretics)
Vomiting
Diarrhea
Cramps
Dizziness or lightheadedness
Joint pain
Palpitations