Guanfacine (Systemic)

Brand Names : Tenex

Side Effects of This Medicine

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor as soon as possible if any of the following side effects occur:

Less common

Confusion; mental depression

Signs and symptoms of overdose

Difficulty in breathing; dizziness (extreme) or faintness; slow heartbeat; unusual tiredness or weakness (severe)

Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your doctor if any of the following side effects continue or are bothersome:

More common

Constipation; dizziness; drowsiness; dryness of mouth

Less common

Decreased sexual ability; dry, itching, or burning eyes; headache; nausea or vomiting; trouble in sleeping; unusual tiredness or weakness

After you have been using this medicine for a while, unwanted effects may occur if you stop taking it too suddenly. After you stop taking this medicine, check with your doctor if any of the following side effects occur:

Anxiety or tenseness; chest pain; fast or irregular heartbeat; headache; increased salivation; nausea or vomiting; nervousness or restlessness; shaking or trembling of hands and fingers; stomach cramps; sweating; trouble in sleeping

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.