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You are here : 3-RX.com > Drugs & Medications > Detailed Drug Information (USP DI) > Thioxanthenes : Side Effects

Thioxanthenes (Systemic)

Thioxanthenes | Before Using | Proper Use | Precautions | Side Effects

Side Effects of This Medicine

Along with their needed effects, thioxanthenes can sometimes cause serious side effects. Tardive dyskinesia (a movement disorder) may occur and may not go away after you stop using the medicine. Signs of tardive dyskinesia include fine, worm-like movements of the tongue, or other uncontrolled movements of the mouth, tongue, cheeks, jaw, or arms and legs. Other serious but rare side effects may also occur. Some of these side effects, including severe muscle stiffness, fever, unusual tiredness or weakness, fast heartbeat, difficult breathing, increased sweating, loss of bladder control, and seizures, may be the sign of a condition called neuroleptic malignant syndrome. You and your doctor should discuss the good this medicine will do as well as the risks of taking it .

Although not all of these side effects may occur, if they do occur they may need medical attention.

Stop taking this medicine and get emergency help immediately if any of the following side effects occur:

    Rare

      Convulsions (seizures); difficulty in breathing; fast heartbeat; high fever; high or low (irregular) blood pressure; increased sweating; loss of bladder control; muscle stiffness (severe); unusually pale skin; unusual tiredness

Also, check with your doctor as soon as possible if any of the following side effects occur:

    More common

      Difficulty in talking or swallowing; inability to move eyes; lip smacking or puckering; loss of balance control; mask-like face; muscle spasms, especially of the neck and back; puffing of cheeks; rapid or worm-like movements of tongue; restlessness or need to keep moving (severe); shuffling walk; stiffness of arms and legs; trembling and shaking of fingers and hands; twisting movements of body; uncontrolled chewing movements; uncontrolled movements of the arms and legs

    Less common

      Blurred vision or other eye problems; difficult urination; fainting; skin discoloration; skin rash

    Rare

      Hot, dry skin or lack of sweating; increased blinking or spasms of eyelid; muscle weakness; sore throat and fever; uncontrolled twisting movements of neck, trunk, arms, or legs; unusual bleeding or bruising; unusual facial expressions or body positions; yellow eyes or skin

    Symptoms of overdose

      Difficulty in breathing (severe); dizziness (severe); drowsiness (severe); muscle trembling, jerking, stiffness, or uncontrolled movements (severe); small pupils; unusual excitement; 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; decreased sweating; dizziness, lightheadedness, or fainting; drowsiness (mild); dryness of mouth; increased appetite and weight; increased sensitivity of skin to sunlight (skin rash, itching, redness or other discoloration of skin, or severe sunburn); stuffy nose

    Less common

      Changes in menstrual period; decreased sexual ability; swelling of breasts (in males and females); unusual secretion of milk

After you stop taking this medicine your body may need time to adjust, especially if you took this medicine in high doses or for a long time. If you stop taking it too quickly, the following withdrawal effects may occur and should be reported to your doctor:

Dizziness; nausea and vomiting; stomach pain; trembling of fingers and hands; uncontrolled, continuing movements of mouth, tongue, or jaw

Although not all of the side effects listed above have been reported for all thioxanthenes, they have been reported for at least one of them. However, since these medicines are very similar, any of the above side effects may occur with any of them.

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


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Thioxanthenes: Precautions

   


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