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Tiagabine Side Effects

Medically reviewed by Last updated on May 18, 2023.

Applies to tiagabine: oral tablet.

Serious side effects of Tiagabine

Along with its needed effects, tiagabine 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 while taking tiagabine:

More common

Less common


Symptoms of overdose

Other side effects of Tiagabine

Some side effects of tiagabine 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

For Healthcare Professionals

Applies to tiagabine: oral tablet.


Very common (10% or more): Common (1% to 10%): Rash, pruritus

Uncommon (0.1% to 1%): Dermatitis bullous dermatitis, bruising

Frequency not reported: Vesiculobullous rash, exfoliative dermatitis[Ref]


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


Very common (10% or more): Nausea (11%)

Common (1% to 10%): Abdominal pain, diarrhea, vomiting, increased appetite, mouth ulceration[Ref]


Very rare (less than 0.01%): Abnormal hepatic function (elevated SGPT, GGT)[Ref]


Common (1% to 10%): Myasthenia, muscle twitching[Ref]


Very common (10% or more): Infection (15%)

Common (1% to 10%): Influenza syndrome[Ref]

Nervous system

Very common (10% or more): Dizziness (27%), asthenia (20%), somnolence (18%), nervousness (10%), tremor

Common (1% to 10%): Ataxia, paresthesia, abnormal gait, nystagmus, speech disorder

Uncommon (0.1% to 1%): Nonconvulsive status epilepticus

Frequency not reported: Encephalopathy[Ref]


Very common (10% or more): Blurred vision, visual field defects

Common (1% to 10%): Amblyopia, diplopia[Ref]


Common (1% to 10%): Pharyngitis, cough, rhinitis[Ref]


Common (1% to 10%): Difficulty with concentration/attention, insomnia, confusion, memory loss, depressed mood, emotional lability, hostility/aggression, agitation

Uncommon (0.1% to 1%): Depression, psychosis

Rare (0.01% to 0.1%): Hallucinations, delusion[Ref]


Very common (10% or more): Accidental injury (17%)

Common (1% to 10%): Pain (unspecified), fatigue[Ref]


1. Cerner Multum, Inc. UK Summary of Product Characteristics.

2. Cerner Multum, Inc. Australian Product Information.

3. Product Information. TiaGABine Hydrochloride (tiaGABine). Teva Pharmaceuticals USA. 2022.

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.