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Tiagabine Side Effects

For the Consumer

Applies to tiagabine: oral capsule, oral tablet

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
  • Blue or purple spots on skin
  • difficulty in concentrating or paying attention
Less common
  • Burning, numbness, or tingling sensations
  • clumsiness or unsteadiness
  • confusion
  • itching
  • mental depression
  • speech or language problems
  • Agitation
  • bloody or cloudy urine
  • burning, pain, or difficulty in urinating
  • frequent urge to urinate
  • generalized weakness
  • hostility
  • memory problems
  • quick to react or overreact emotionally
  • rash
  • uncontrolled back-and-forth and/or rolling eye movements
  • walking in unusual manner
Symptoms of overdose
  • Agitation (severe)
  • clumsiness or unsteadiness (severe)
  • coma
  • confusion (severe)
  • drowsiness (severe)
  • increase in seizures
  • mental depression
  • severe muscle twitching or jerking
  • sluggishness
  • speech problems (severe)
  • weakness

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
  • Abdominal pain
  • flushing
  • impaired vision
  • increased appetite
  • increased cough
  • mouth ulcers
  • muscle weakness
  • nausea
  • pain
  • trouble in sleeping

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 liability, 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." O 0

2. "Product Information. Tiagabine Hydrochloride (tiaGABine (tiagabine))." Teva Pharmaceuticals USA, North Wales, PA.

3. Cerner Multum, Inc. "Australian Product Information." O 0

Some side effects of tiagabine may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.