Generic Name: Gabapentin Enacarbil (gab a PEN tin en a KAR bil)
Brand Name: Horizant
Medically reviewed on July 4, 2018
Uses of Horizant:
- It is used to treat restless leg syndrome.
- It is used to treat painful nerve diseases.
- It may be given to you for other reasons. Talk with the doctor.
What do I need to tell my doctor BEFORE I take Horizant?
- If you have an allergy to gabapentin or any other part of Horizant (gabapentin enacarbil).
- If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
- If you have restless leg syndrome and you need to sleep during the daytime and stay awake at night.
- If you are on dialysis, talk with your doctor.
- If you are taking another drug that has the same drug in it.
- If you are breast-feeding or plan to breast-feed.
This is not a list of all drugs or health problems that interact with Horizant (gabapentin enacarbil).
Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Horizant (gabapentin enacarbil) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.
What are some things I need to know or do while I take Horizant?
- Tell all of your health care providers that you take Horizant (gabapentin enacarbil). This includes your doctors, nurses, pharmacists, and dentists.
- Avoid driving and doing other tasks or actions that call for you to be alert until you see how Horizant (gabapentin enacarbil) affects you.
- Have blood work checked as you have been told by the doctor. Talk with the doctor.
- Avoid drinking alcohol while taking Horizant (gabapentin enacarbil).
- Talk with your doctor before you use other drugs and natural products that slow your actions.
- This medicine is not the same as gabapentin (Gralise™, Neurontin®). Do not use in its place. Talk with your doctor.
- A very bad and sometimes deadly reaction has happened with Horizant (gabapentin enacarbil). Most of the time, this reaction has signs like fever, rash, or swollen glands with problems in body organs like the liver, kidney, blood, heart, muscles and joints, or lungs. Talk with the doctor.
- Do not stop taking Horizant (gabapentin enacarbil) all of a sudden without calling your doctor. You may have a greater risk of side effects. If you need to stop Horizant (gabapentin enacarbil), you will want to slowly stop it as ordered by your doctor.
- If you are 65 or older, use Horizant (gabapentin enacarbil) with care. You could have more side effects.
- Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using Horizant (gabapentin enacarbil) while you are pregnant.
How is this medicine (Horizant) best taken?
Use Horizant (gabapentin enacarbil) as ordered by your doctor. Read all information given to you. Follow all instructions closely.
- Take Horizant (gabapentin enacarbil) with food.
- Swallow whole. Do not chew, break, or crush.
- For restless leg syndrome, take about 5 PM each day.
What do I do if I miss a dose?
- Skip the missed dose and go back to your normal time.
- Do not take 2 doses at the same time or extra doses.
See also: Dosage Information (in more detail)
What are some side effects that I need to call my doctor about right away?
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
- Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- Signs of liver problems like dark urine, feeling tired, not hungry, upset stomach or stomach pain, light-colored stools, throwing up, or yellow skin or eyes.
- Signs of kidney problems like unable to pass urine, change in how much urine is passed, blood in the urine, or a big weight gain.
- Feeling confused.
- Feeling very tired or weak.
- Muscle pain or weakness.
- Blurred eyesight.
- Chest pain or pressure.
- Shortness of breath, a big weight gain, or swelling in the arms or legs.
- Any unexplained bruising or bleeding.
- Fever or chills.
- Sore throat.
- Swollen gland.
- Patients who take Horizant (gabapentin enacarbil) may be at a greater risk of having thoughts or actions of suicide. The risk may be greater in people who have had these thoughts or actions in the past. Call the doctor right away if signs like low mood (depression), nervousness, restlessness, grouchiness, panic attacks, or changes in mood or actions are new or worse. Call the doctor right away if any thoughts or actions of suicide occur.
What are some other side effects of Horizant?
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
- Feeling sleepy.
- Upset stomach.
- Feeling tired or weak.
- Not able to sleep.
- Weight gain.
These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.
You may report side effects to the FDA at 1-800-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.
See also: Side effects (in more detail)
If OVERDOSE is suspected:
If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
How do I store and/or throw out Horizant?
- Store at room temperature.
- Store in the original container. Do not take out the antimoisture cube or packet.
- Store in a dry place. Do not store in a bathroom.
- Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
- Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
Consumer information use
- If your symptoms or health problems do not get better or if they become worse, call your doctor.
- Do not share your drugs with others and do not take anyone else's drugs.
- Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
- Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.
- Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about Horizant (gabapentin enacarbil), please talk with your doctor, nurse, pharmacist, or other health care provider.
- If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
More about Horizant (gabapentin enacarbil)
- Horizant Side Effects
- During Pregnancy
- Dosage Information
- Drug Images
- Drug Interactions
- Support Group
- Pricing & Coupons
- 22 Reviews
- Drug class: gamma-aminobutyric acid analogs