SIDE EFFECTS: Dizziness, lightheadedness, drowsiness, dry mouth, or constipation may occur as your body adjusts to the medication. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. To relieve dry mouth, suck on (sugarless) hard candy or ice chips, chew (sugarless) gum, drink water or use a saliva substitute. Tell your doctor immediately if any of these unlikely but serious side effects occur: fast/slow/irregular heartbeat, depression. A serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction include: rash, itching, swelling, severe dizziness, trouble breathing. If you notice other effects not listed above, contact your doctor or pharmacist.

PRECAUTIONS: Before taking clonidine, tell your doctor or pharmacist if you are allergic to it; or if you developed a rash during treatment with clonidine in the patch form; or if you have any other allergies. Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney disease, heart disease (e.g., severe coronary insufficiency, conduction disorders, recent heart attack), depression, blood circulation disorders (e.g., Raynaud's disease). Before having surgery, tell your doctor or dentist that you are taking this medication. This drug may make you dizzy or drowsy; use caution engaging in activities requiring alertness such as driving or using machinery. Limit alcoholic beverages. To minimize dizziness and lightheadedness, get up slowly when rising from a seated or lying position. Caution is advised when using this drug in the elderly because they may be more sensitive to its effects, especially dizziness. Caution is advised when using this drug in children. If they cannot take doses of this medication due to vomiting from stomach/abdominal illnesses, they may be at increased risk for developing rebound hypertension. (See How to Use section.) Consult your doctor immediately about what to do in case your child becomes too ill to take this medication. This medication should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor. This drug passes into breast milk. Consult your doctor before breast-feeding.