Tiagabine is used in combination with other medications to treat partial seizures (a type of epilepsy). Tiagabine is in a class of medications called anticonvulsants. It is not known exactly how tiagabine works, but it increases the number of natural chemicals in the brain that prevents seizure activity.

Side Effects Of Tiagabine

Tiagabine may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

  • dizziness or lightheadedness
  • drowsiness
  • lack of energy or weakness
  • wobbliness, unsteadiness, or incoordination causing difficulty walking
  • depression
  • hostility or anger
  • irritability
  • confusion
  • difficulty concentrating or paying attention
  • abnormal thinking
  • speech or language problems
  • increased appetite
  • nausea
  • stomach pain
  • nervousness
  • difficulty falling asleep or staying asleep
  • itching
  • bruising
  • painful or frequent urination

Some side effects  Of tiagabine can be serious. The following symptoms are uncommon, but if you experience any of them, call your doctor immediately:

  • rash
  • sores on the inside of your mouth, nose, eyes or throat
  • flu-like symptoms
  • changes in vision
  • severe weakness
  • shaking hands you cannot control
  • numbness, pain, burning or tingling in the hands or feet
  • seizures, including status epilepticus

Warnings & Precautions

Before taking tiagabine:

  • tell your doctor and pharmacist if you are allergic to tiagabine or any other medications.
  • tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, and nutritional supplements you are taking or plan to take. Be sure to mention any of the following: amiodarone (Cordarone, Pacerone);anticonvulsants such as carbamazepine (Tegretol), ethosuximide (Zarontin), gabapentin (Neurontin), lamotrigine (Lamictal), phenobarbital (Luminal, Solfoton), phenytoin (Dilantin, Phenytek), primidone (Mysoline), and valproic acid (Depakene, Depakote); anticholinesterases such as neostigmine (Prostigmin), physostigmine (Antilirium), and pyridostigmine (Mestinon, Regonol); antidepressants; antifungals such as fluconazole (Diflucan), itraconazole (Sporanox), and ketoconazole (Nizoral); chloroquine sulfate (Aralen); clarithromycin (Biaxin, in Prevpac); contrast dyes used during radiology procedures (CAT scans, X-rays); cyclosporine (Neoral, Sandimmune); dexamethasone (Decadron, Dexpak); diazepam (Valium); dicloxacillin; diltiazem (Cardizem, Dilacor, Tiazac, others); erythromycin (E.E.S., E-Mycin, Erythrocin); furosemide (Lasix); griseofulvin (Fulvicin-U/F, Grifulvin V, Gris-PEG); isoniazid (INH, Laniazid, Nydrazid); imipenem-cilastatin (Primaxin); lovastatin (Altocor, Mevacor, in Advicor); medications to treat HIV infection including delavirdine (Rescriptor), efavirenz (Sustiva), nevirapine (Viramune), and ritonavir (Norvir, in Kaletra); medications that may make you drowsy such as cough, cold, and allergy products, medications for anxiety, muscle relaxants, pain medications, sedatives, sleeping pills, or tranquilizers; medications for mental illness; methocarbamol (Robaxin); mycophenolate mofetil (CellCept); penicillins; phenylbutazone (no longer available in the US);propranolol (Inderal, Inderide); quinidine (Quinidex); quinolones such as cinoxacin (Cinobac) (no longer available in the US), ciprofloxacin (Cipro), enoxacin (Penetrex) (no longer available in the US), gatifloxacin (Tequin), levofloxacin (Levaquin), lomefloxacin (Maxequin), nalidixic acid (NegGram) (no longer available in the US), norfloxacin (Noroxin), ofloxacin (Floxin), sparfloxacin (Zagam) and trovafloxacin/alatrofloxacin combination (Trovan) (no longer available in the US); rifabutin (Mycobutin ); rifampin (Rifadin, Rifamate, Rimactane, others); stimulants such as caffeine-containing products and decongestants; tacrolimus (Prograf); triazolam (Halcion); troleandomycin (TAO); verapamil (Calan, Covera, Isoptin, Verelan); warfarin (Coumadin); or zafirlukast (Accolate).
  • tell your doctor what herbal products you are taking, especially St. John’s wort.
  • tell your doctor if you have or have ever had a severe rash caused by taking a medication; status epilepticus (seizures following one another without a break); or eye or liver disease.
  • tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking tiagabine, call your doctor immediately.
  • if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking tiagabine.
  • you should know that tiagabine may make you drowsy and may affect your ability to think clearly. Do not drive a car or operate machinery until you know how this drug will affect you.
  • remember that alcohol may add to the drowsiness caused by this medication. Ask your doctor about the safe use of alcoholic beverages while you are taking tiagabine.
  • you should know that seizures, including status epilepticus, have occurred in people without epilepsy who take tiagabine. These seizures usually occurred soon after beginning treatment with tiagabine or near the time of a dose increase, but also have also occurred at other times during treatment.
  • you should know that your mental health may change in unexpected ways and you may become suicidal (thinking about harming or killing yourself or planning or trying to do so) while you are taking tiagabine for the treatment of epilepsy, mental illness, or other conditions. A small number of adults and children 5 years of age and older (about 1 in 500 people) who took anticonvulsants such as tiagabine to treat various conditions during clinical studies became suicidal during their treatment. Some of these people developed suicidal thoughts and behavior as early as one week after they started taking the medication. There is a risk that you may experience changes in your mental health if you take an anticonvulsant medication such as tiagabine, but there may also be a risk that you will experience changes in your mental health if your condition is not treated. You and your doctor will decide whether the risks of taking an anticonvulsant medication are greater than the risks of not taking the medication. You, your family, or your caregiver should call your doctor right away if you experience any of the following symptoms: panic attacks; agitation or restlessness; new or worsening irritability, anxiety, or depression; acting on dangerous impulses; difficulty falling or staying asleep; aggressive, angry, or violent behavior; mania (frenzied, abnormally excited mood); talking or thinking about wanting to hurt yourself or end your life; withdrawing from friends and family; preoccupation with death and dying; giving away prized possessions, or any other unusual changes in behavior or mood. Be sure that your family or caregiver knows which symptoms may be serious so they can call the doctor if you are unable to seek treatment on your own.

Dosage Of Tiagabine

Tiagabine comes as a tablet to take by mouth. It usually is taken with food two to four times a day. However, for the first week of treatment, you will only take tiagabine once a day. Your doctor will slowly increase your dose (not more often than once each week) until you reach the dose of tiagabine you are to take regularly. To help you remember to take tiagabine, take it around the same time(s) every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take tiagabine exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

Continue to take tiagabine even if you feel well. Do not stop taking tiagabine without talking to your doctor, even if you experience side effects such as unusual changes in behavior or mood. Abruptly stopping this medication can cause seizures. Your doctor will probably decrease your dose gradually.


Keep all appointments with your doctor and the laboratory.

Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription of tiagabine.

It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.


All information has been provided courtesy of MedLinePlus from the National Library of Medicine and from the FDA.