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Baclofen is a muscle relaxer and an antispastic agent.
Baclofen is used to treat muscle symptoms caused by multiple
sclerosis, including spasm, pain, and stiffness.Less common or rare
Bloody or dark urinechest painfaintinghallucinations (seeing or hearing things that are not there)mental depression or other mood changesringing or buzzing in the earsskin rash or itchingSymptoms of overdose
Blurred or double visionconvulsions (seizures)muscle weakness (severe)shortness of breath or unusually slow or troubled breathingvomitingSome 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. Also, your health care professional may be able
to tell you about ways to prevent or reduce some of these side effects.
Check with your health care professional if any of the following side
effects continue or are bothersome or if you have any questions about
them:
More common
Confusiondizziness or lightheadednessdrowsinessnauseaunusual weakness, especially muscle weaknessLess common or rare
Abdominal or stomach pain or discomfortclumsiness, unsteadiness, trembling, or other problems with muscle
controlconstipationdiarrheadifficult or painful urination or decrease in amount of urinefalse sense of well-beingfrequent urge to urinate or uncontrolled urinationheadacheloss of appetitelow blood pressuremuscle or joint painnumbness or tingling in hands or feetpounding heartbeatsexual problems in malesslurred speech or other speech problemsstuffy noseswelling of anklestrouble in sleepingunexplained muscle stiffnessunusual excitementunusual tirednessweight gainAfter you stop using baclofen, it may still produce some side effects:
Convulsions (seizures)hallucinations (seeing or hearing things that are not there)increase in muscle spasm, cramping, or tightnessmood or mental changesunusual nervousness or restlessness