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Halucination (54)
Memory Loss (53)
Headache (37)
Muscle Spasms (37)
Increased High Blood Pressure (32)
Stiffness (31)
Acute Episodic Anxiety (28)
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Gabapentin Side Effects and Adverse Effects reported to US Food and Drug Administration (FDA)

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Showing 1-25 of 3153 

Posterior Reversible Encephalopathy Syndrome, Overdose, Respiratory Depression, Hypertension, Depressed Level Of Consciousness, Injury, Status Epilepticus, Pain, Abnormal Behaviour (8455938-5)
on Jun 18, 2012 Female from UNITED STATES , 50 years of age, was treated with Gabapentin. Directly after, patient experienced the unwanted or unexpected Gabapentin side effects: posterior reversible encephalopathy syndrome, overdose, respiratory depression, hypertension, depressed level of consciousness, injury, status epilepticus, pain, abnormal behaviour. Gabapentin dosage: N/A. Patient was hospitalized.

Diplopia, Vision Blurred, Cataract (8454953-5)
Patient was taking Gabapentin. Patient felt the following Gabapentin side effects: diplopia, vision blurred, cataract on Jun 18, 2012 from UNITED STATES Additional patient health information: Male , weighting 170.0 lb, was diagnosed with
  • neuropathy peripheral
and. Gabapentin dosage: 300 Mg, 2x/day.

Vertigo, Depressed Level Of Consciousness (8454805-0)
Adverse event was reported on Jun 15, 2012 by a Male taking Gabapentin (Dosage: 100mg Tid Oral) was diagnosed with
  • spinal column stenosis
  • spinal pain
and. Location: UNITED STATES , 73 years of age, weighting 155.0 lb, After Gabapentin was administered, patient encountered several Gabapentin side effects: vertigo, depressed level of consciousness.

Maternal Exposure During Pregnancy, Abortion Spontaneous (8453951-5)
on Jun 07, 2012 Female from UNITED KINGDOM , 36 years of age, weighting 202.6 lb, was diagnosed with
  • pain
and was treated with Gabapentin. Directly after, patient experienced the unwanted or unexpected Gabapentin side effects: maternal exposure during pregnancy, abortion spontaneous. Gabapentin dosage: N/A.
Associated medications used:
  • Acetaminophen And Codeine Phosphate (30/500)



Hypersomnia, Abdominal Distension (8453327-0)
on May 12, 2012 Male from , weighting 250.2 lb, was diagnosed with
  • neuralgia
  • arthralgia
  • hypertension
  • hepatitis c
and was treated with Gabapentin. Patient felt the following Gabapentin side effects: hypersomnia, abdominal distension. Gabapentin dosage: N/A.
Multiple prescriptions taken:
  • Indocin
  • Metoprolol Succinate
  • Incivek
  • Pegasys
  • Hydroxyzine
  • Trazodone Hcl
  • Aspirin
  • Ribavirin


Abortion Spontaneous, Pregnancy, Maternal Exposure During Pregnancy (8450779-7)
Patient was taking Gabapentin. After Gabapentin was administered, patient encountered several Gabapentin side effects: abortion spontaneous, pregnancy, maternal exposure during pregnancy on Jun 07, 2012 from Additional patient health information: Female , 36 years of age, weighting 202.6 lb, was diagnosed with
  • pain
  • ulcer
and. Gabapentin dosage: N/A.

Abortion Spontaneous (8450153-3)
Adverse event was reported on Jun 10, 2012 by a Female taking Gabapentin (Dosage: 900 Milligram;) was diagnosed with
  • ulcer
  • pain
and. Location: UNITED KINGDOM , 36 years of age, weighting 202.6 lb, Directly after, patient experienced the unwanted or unexpected Gabapentin side effects: abortion spontaneous.

Oedema Peripheral (8449678-6)
on Jun 18, 2012 Female from UNITED STATES , weighting 218.3 lb, was diagnosed with
  • back disorder
and was treated with Gabapentin. Patient felt the following Gabapentin side effects: oedema peripheral. Gabapentin dosage: 300 Mg, 3x/day.

Pain (8449196-5)
on Jun 13, 2012 Female from UNITED STATES , 51 years of age, weighting 136.7 lb, was treated with Gabapentin. After Gabapentin was administered, patient encountered several Gabapentin side effects: pain. Gabapentin dosage: N/A.

Full Blood Count Abnormal, Contusion, Blood Disorder, Abdominal Pain, Diarrhoea, Thrombocytopenia, Haematemesis (8447545-5)
Patient was taking Gabapentin. Directly after, patient experienced the unwanted or unexpected Gabapentin side effects: full blood count abnormal, contusion, blood disorder, abdominal pain, diarrhoea, thrombocytopenia, haematemesis on Jun 15, 2012 from UNITED KINGDOM Additional patient health information: Female , 42 years of age, . Gabapentin dosage: N/A.
Associated medications used:
  • Miconazole
  • Nystatin
  • Hydroxychloroquine Sulfate
  • Flucloxacillin
  • Metronidazole
  • Omeprazole (prisolec)
  • Scheriproct
  • Methotrexate
Patient was hospitalized.

Lactic Acidosis, Hyperkalaemia (8446228-5)
Adverse event was reported on Jun 11, 2012 by a Male taking Gabapentin (Dosage: N/A) . Location: UNITED STATES , 69 years of age, Patient felt the following Gabapentin side effects: lactic acidosis, hyperkalaemia.
Multiple prescriptions taken:
  • Clopidogrel
  • Lisinopril
  • Rosuvastatin
  • Metformin Hcl
  • Metoprolol Succinate
  • Glipizide
  • Sertraline Hydrochloride
  • Omeprazole
Patient was hospitalized.

Jugular Vein Thrombosis (8443842-8)
on Jun 14, 2012 Female from UNITED STATES , 32 years of age, weighting 288.8 lb, was diagnosed with
  • neuralgia
and was treated with Gabapentin. After Gabapentin was administered, patient encountered several Gabapentin side effects: jugular vein thrombosis. Gabapentin dosage: 300 Mg, Unk.
Multiple concurrent drugs taken:
  • Dilaudid
  • Ixabepilone (Dose: 70 Mg)
  • Lortab (10 Mg, Unk)
  • Compazine (10 Mg, Unk)
  • Sorafenib (raf Kinase Inhibitor) (400 Mg, Bid)
  • Ambien (5 Mg, Unk)
  • Metoprolol Succinate (25 Mg, Unk)
  • Amlodipine Besylate (10 Mg, Unk)
Patient was hospitalized.

Abortion Spontaneous (8443754-X)
on Jun 07, 2012 Female from UNITED KINGDOM , 36 years of age, weighting 202.6 lb, was diagnosed with
  • ulcer
  • pain
and was treated with Gabapentin. Directly after, patient experienced the unwanted or unexpected Gabapentin side effects: abortion spontaneous. Gabapentin dosage: 300 Mg, Tid.

Completed Suicide, Intentional Overdose (8443397-8)
Patient was taking Gabapentin. Patient felt the following Gabapentin side effects: completed suicide, intentional overdose on Jun 05, 2012 from UNITED STATES Additional patient health information: Female , 62 years of age, . Gabapentin dosage: Unk.
Multiple prescriptions taken:
  • Simvastatin (Unk)
  • Fluoxetine (Unk)


Therapeutic Response Decreased, Platelet Count Abnormal, Joint Swelling, Blood Pressure Increased (8442771-3)
Adverse event was reported on Aug 30, 2010 by a Female taking Gabapentin (Dosage: N/A) . Location: UNITED STATES , 49 years of age, weighting 200.2 lb, After Gabapentin was administered, patient encountered several Gabapentin side effects: therapeutic response decreased, platelet count abnormal, joint swelling, blood pressure increased.
Multiple concurrent drugs taken:
  • Nplate (6 Mug/kg, Unk)


Cerebrovascular Accident (8440120-8)
on Jun 04, 2012 Female from GERMANY , 66 years of age, weighting 266.8 lb, was treated with Gabapentin. Directly after, patient experienced the unwanted or unexpected Gabapentin side effects: cerebrovascular accident. Gabapentin dosage: N/A.
Associated medications used:
  • Leflunomide
  • Actemra
  • Carbamazepine
  • Micardis Hct
Patient was hospitalized.

Pain, Depression, Dehydration, Tremor, Malaise, Food Intolerance, Fatigue, Memory Impairment (8439522-5)
on Jun 11, 2012 Male from UNITED STATES , weighting 220.0 lb, was diagnosed with
  • fibromyalgia
and was treated with Gabapentin. Patient felt the following Gabapentin side effects: pain, depression, dehydration, tremor, malaise, food intolerance, fatigue, memory impairment. Gabapentin dosage: 300 Mg, 3x/day.
Multiple prescriptions taken:
  • Cymbalta (Unk)


Pyrexia, Wound (8438180-3)
Patient was taking Gabapentin. After Gabapentin was administered, patient encountered several Gabapentin side effects: pyrexia, wound on Jun 08, 2012 from AUSTRALIA Additional patient health information: Male , 40 years of age, . Gabapentin dosage: N/A.
Multiple concurrent drugs taken:
  • Ascorbic Acid
  • Nilstat (2 Drops)
  • Celecoxib
  • Metoclopramide
  • Avastin
  • Dexamethasone
  • Dexamethasone (Dose Reduction)
  • Dexamethasone (Reduced Dose)


Pain, Nervousness, Muscle Disorder, Fatigue, Decreased Interest, Self Esteem Decreased, Headache, Mental Disorder, Disturbance In Attention (8436798-5)
Adverse event was reported on Jun 11, 2012 by a Male taking Gabapentin (Dosage: N/A) was diagnosed with
  • depression
  • convulsion
and. Location: UNITED STATES , weighting 165.0 lb, Directly after, patient experienced the unwanted or unexpected Gabapentin side effects: pain, nervousness, muscle disorder, fatigue, decreased interest, self esteem decreased, headache, mental disorder, disturbance in attention.
Associated medications used:
  • Klonopin
  • Suboxone (8/2 Mg, Daily)
  • Klonopin


Headache, Myalgia, Asthenia, Decreased Interest, Nervousness, Disturbance In Attention, Balance Disorder, Musculoskeletal Stiffness, Paranoia (8435881-8)
on Jun 11, 2012 Male from UNITED STATES , weighting 165.0 lb, was treated with Gabapentin. Patient felt the following Gabapentin side effects: headache, myalgia, asthenia, decreased interest, nervousness, disturbance in attention, balance disorder, musculoskeletal stiffness, paranoia. Gabapentin dosage: 300 Mg, 4x/day.
Multiple prescriptions taken:
  • Klonopin
  • Klonopin (2 Mg, 2x/day)
  • Klonopin
  • Suboxone (8/2 Mg, Daily)


Platelet Count Decreased, Thrombocytopenia (8435463-8)
on Jun 11, 2012 Male from UNITED KINGDOM , 78 years of age, weighting 158.7 lb, was diagnosed with
  • spinal column stenosis
and was treated with Gabapentin. After Gabapentin was administered, patient encountered several Gabapentin side effects: platelet count decreased, thrombocytopenia. Gabapentin dosage: 300 Mg, 3x/day.

Intentional Overdose, Toxicity To Various Agents, Completed Suicide (8435250-0)
Patient was taking Gabapentin. Directly after, patient experienced the unwanted or unexpected Gabapentin side effects: intentional overdose, toxicity to various agents, completed suicide on May 31, 2012 from UNITED STATES Additional patient health information: Female , 62 years of age, weighting 266.8 lb, . Gabapentin dosage: N/A.
Associated medications used:
  • Simvastatin
  • Fluoxetine
  • Clonazepam


Insomnia (8435000-8)
Adverse event was reported on Jun 11, 2012 by a Female taking Gabapentin (Dosage: 300 Mg, 3x/day) was diagnosed with
  • peripheral nerve operation
  • cystitis interstitial
and. Location: UNITED STATES , weighting 97.00 lb, Patient felt the following Gabapentin side effects: insomnia.

Asthenia, Dizziness, Fatigue, Malaise, Somnolence (8434987-7)
on Jun 08, 2012 Female from UNITED STATES , weighting 175.0 lb, was diagnosed with
  • neuropathy peripheral
  • hypertension
and was treated with Gabapentin. After Gabapentin was administered, patient encountered several Gabapentin side effects: asthenia, dizziness, fatigue, malaise, somnolence. Gabapentin dosage: 100 Mg, Unk.
Multiple concurrent drugs taken:
  • Losartan Potassium (15 Mg, Unk)
  • Hydrochlorothiazide (12.5 Mg, Unk)
  • Metoprolol (25 Mg, Daily)
  • Celebrex (200 Mg, 2x/day)
  • Diazepam (Unk)
  • Prednisolone (Unk)


Temperature Intolerance, Dysuria, Bronchitis, Thirst, Balance Disorder, Influenza Like Illness (8434624-1)
on Jun 08, 2012 Female from UNITED STATES , 36 years of age, was diagnosed with
  • paraesthesia
  • multiple sclerosis
and was treated with Gabapentin. Directly after, patient experienced the unwanted or unexpected Gabapentin side effects: temperature intolerance, dysuria, bronchitis, thirst, balance disorder, influenza like illness. Gabapentin dosage: N/A.
Associated medications used:
  • Avonex


Showing 1-25 of 3153 

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It is very important to keep track of all side effects and discuss them with your doctor. If you think you may have a medical emergency, call your doctor or 911 immediately.

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Most drugs have a large list of nonsevere or mild adverse effects which do not rule out continued usage. These effects depend on individual sensitivity, and can include nausea, dizziness, diarrhea, malaise, vomiting, headache, dermatitis, dry mouth, etc. Check commonly reported side effects . These can be considered a form of pseudo-allergic reaction, as not all users experience these effects; many users experience none at all.

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Gabapentin Information

Alternative GABAPENTIN Names:GABAPENTI

Active Ingredient: GABAPENTI

Gabapentin Dosage, Warnings, Usage.

Side Effects reported to FDA: 3153. View Gabapentin Adverse Reports

Gabapentin safety alerts: 2005

Reported deaths: 396

Reported hospitalizations: 914

Neurontin (gabapentin)

Audience: Neuropsychiatric healthcare professionals, pharmacists and consumers

Pfizer Inc. and FDA notified healthcare professionals of the voluntary recall of one lot (40,000 bottles) of 100 mg capsules of its epilepsy medication, Neurontin, after a manufacturing mechanical failure resulted in some bottles containing empty or partially filled capsules. Patients taking Neurontin to control epilepsy could experience seizures from a missed dose of the product. 100 mg strength capsules from lot #15224V -- distributed in October and November, 2004 -- are included in the recall. The production lot was distributed only in the United States. No other Neurontin lots were affected.

[April 22, 2005 - Press Release - Pfizer]

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