Kemstro

Last updated on RxList: 5/21/2021
Kemstro Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

What Is Kemstro?

Kemstro (baclofen orally disintegrating tablets) is a muscle relaxant and antispastic used to alleviate signs and symptoms of spasticity resulting from multiple sclerosis, particularly for the relief of flexor spasms and concomitant pain, clonus, and muscular rigidity. The brand name Kemstro is discontinued, but generic versions may be available.

What Are Side Effects of Kemstro?

Common side effects of Kemstro (baclofen) include:

Dosage for Kemstro

Start therapy with Kemstro at a low dosage and increase gradually until optimum effect is achieved (usually between 40-80 mg daily).

What Drugs, Substances, or Supplements Interact with Kemstro?

Kemstro may interact with alcohol and other CNS depressants. Tell your doctor all medications and supplements you use.

Kemstro During Pregnancy or Breastfeeding

During pregnancy, Kemstro should be used only if prescribed. It is unknown if this drug passes into breast milk. Consult your doctor before breastfeeding. Withdrawal symptoms may occur if you suddenly stop taking this medication.

Additional Information

Our Kemstro (baclofen orally disintegrating tablets) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

QUESTION

What kind of disease is multiple sclerosis? See Answer
Kemstro Consumer Information

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Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have:

  • severe drowsiness, weak or shallow breathing;
  • confusion, hallucinations;
  • itching, tingling, or twitching in your hands, arms, feet, or legs;
  • fever; or
  • a seizure.

Common side effects may include:

  • drowsiness, dizziness, weakness, tiredness;
  • headache;
  • sleep problems (insomnia);
  • nausea, constipation; or
  • urinating more often than usual.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the entire detailed patient monograph for Kemstro (Baclofen)

SLIDESHOW

What Is Multiple Sclerosis? MS Symptoms, Causes, Diagnosis See Slideshow
Kemstro Professional Information

SIDE EFFECTS

The most common adverse reaction during treatment with baclofen is transient drowsiness (10-63%). In one controlled study of 175 patients, transient drowsiness was observed in 63% of those receiving baclofen tablets compared to 36% of those in the placebo group. Other common adverse reactions are dizziness (5-15%), weakness (5-15%) and fatigue (2-4%). Others reported:

Neuropsychiatric: Confusion (1-11%), headache (4-8%), insomnia (2-7%); and, rarely, euphoria, excitement, depression, hallucinations, paresthesia, muscle pain, tinnitus, slurred speech, coordination disorder, tremor, rigidity, dystonia, ataxia, blurred vision, nystagmus, strabismus, miosis, mydriasis, diplopia, dysarthria, epileptic seizure.

Cardiovascular: Hypotension (0-9%). Rare instances of dyspnea, palpitation, chest pain, syncope.

Gastrointestinal: Nausea (4-12%), constipation (2-6%); and, rarely, dry mouth, anorexia, taste disorder, abdominal pain, vomiting, diarrhea, and positive test for occult blood in stool.

Genitourinary: Urinary frequency (2-6%); and, rarely, enuresis, urinary retention, dysuria, impotence, inability to ejaculate, nocturia, hematuria.

Other: Instances of rash, pruritus, ankle edema, excessive perspiration, weight gain, nasal congestion. Some of the CNS and genitourinary symptoms may be related to the underlying disease rather than to drug therapy. The following laboratory tests have been found to be abnormal in a few patients receiving baclofen: increased SGOT, elevated alkaline phosphatase, and elevation of blood sugar.

The adverse experience profile seen with KEMSTRO™ was similar to that seen with baclofen tablets.

Read the entire FDA prescribing information for Kemstro (Baclofen)

© Kemstro Patient Information is supplied by Cerner Multum, Inc. and Kemstro Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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