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Focalin Side Effects

Generic Name: dexmethylphenidate

Note: This document contains side effect information about dexmethylphenidate. Some of the dosage forms listed on this page may not apply to the brand name Focalin.

In Summary

More frequent side effects include: fever. See below for a comprehensive list of adverse effects.

For the Consumer

Applies to dexmethylphenidate: oral capsule extended release, oral tablet

Along with its needed effects, dexmethylphenidate (the active ingredient contained in Focalin) 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 immediately if any of the following side effects occur while taking dexmethylphenidate:

Less Common


  • Blurred vision
  • vision changes

Incidence Not Known

  • Convulsions
  • jerking of the arms and legs
  • muscle spasm
  • sudden loss of consciousness

Some side effects of dexmethylphenidate 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

Less Common

  • Twitching

For Healthcare Professionals

Applies to dexmethylphenidate: oral capsule extended release, oral tablet


Frequency not reported: Angina, arrhythmia, palpitations, increased or decreased pulse, tachycardia, increased or decreased blood pressure, cerebral arteritis and/or occlusion

Postmarketing reports: Peripheral vasculopathy (including Raynaud's phenomenon)[Ref]


Very common (10% or more): Psychiatric disorders (up to 46%), insomnia (up to 17%), feeling jittery (up to 12%), anxiety (up to 11%)

Common (1% to 10%): Depression, mood swings, irritability

Frequency not reported: Transient depressed mood, aggressive behavior, libido changes (all reported by patients taking methylphenidate)[Ref]

Nervous system

Very common (10% or more): Nervous system disorders (up to 50%), headache (up to 39%)

Common (1% to 10%): Dizziness

Frequency not reported: Drowsiness, dyskinesia, headache, Tourette's syndrome, toxic psychosis, neuroleptic malignant syndrome (reported by patients taking methylphenidate)[Ref]


Frequency not reported: Hypersensitivity reactions (including angioedema, anaphylaxis, skin rash, urticaria, fever, arthralgia, exfoliative dermatitis, erythema multiforme with histopathological findings of necrotizing vasculitis, and thrombocytopenic purpura)[Ref]


Postmarketing reports: Rhabdomyolysis


Very common (10% or more): GI disorders (up to 44%), dry mouth (up to 20%), abdominal pain (up to 15%)

Common (1% to 10%): Dyspepsia, nausea, vomiting[Ref]


Very common (10% or more): Metabolism/nutrition disorders (up to 34%), decreased appetite (up to 30%)

Common (1% to 10%): Anorexia

Frequency not reported: Weight loss during prolonged therapy[Ref]


Very common (10% or more): Respiratory/thoracic/mediastinal disorders (up to 16%)

Common (1% to 10%): Nasal congestion, pharyngolaryngeal pain[Ref]


Common (1% to 10%): Pruritus

Frequency not reported: Scalp hair loss (reported by patients taking methylphenidate)[Ref]


Common (1% to 10%): Fever[Ref]


Frequency not reported: Priapism (reported by patients taking methylphenidate)


Frequency not reported: Leukopenia and/or anemia (reported by patients taking methylphenidate)[Ref]


Frequency not reported: Abnormal liver function (ranging from transaminase elevation to hepatic coma; reported by patients taking methylphenidate)[Ref]


Nervousness and insomnia are the most common adverse reactions reported with other methylphenidate products. In children, the following adverse reactions may occur more frequently: loss of appetite, abdominal pain, weight loss during prolonged therapy, insomnia, and tachycardia.


1. "Product Information. Focalin (dexmethylphenidate)." Mikart Inc, Atlanta, GA.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.

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