Medically reviewed on September 5, 2018
Uses of Belviq XR:
- It is used to help you lose weight.
What do I need to tell my doctor BEFORE I take Belviq XR?
- If you have an allergy to lorcaserin or any other part of Belviq XR (lorcaserin extended-release tablets).
- 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 kidney disease.
- If you are taking cabergoline.
- If you are pregnant or may be pregnant. Do not take Belviq XR (lorcaserin extended-release tablets) if you are pregnant.
- If you are breast-feeding. Do not breast-feed while you take Belviq XR (lorcaserin extended-release tablets).
- If the patient is a child. Do not give Belviq XR (lorcaserin extended-release tablets) to a child.
This is not a list of all drugs or health problems that interact with Belviq XR (lorcaserin extended-release tablets).
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 Belviq XR (lorcaserin extended-release tablets) 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 Belviq XR?
- Tell all of your health care providers that you take Belviq XR (lorcaserin extended-release tablets). 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 Belviq XR (lorcaserin extended-release tablets) affects you.
- Follow the diet and workout plan that your doctor told you about.
- Have blood work checked as you have been told by the doctor. Talk with the doctor.
- If you have high blood sugar (diabetes) and take drugs to lower blood sugar, talk with your doctor. Weight loss may raise the chance of low blood sugar if you take drugs to lower blood sugar. Call your doctor right away if you have signs of low blood sugar like dizziness, headache, feeling sleepy, feeling weak, shaking, a fast heartbeat, confusion, hunger, or sweating.
- Certain drugs used for weight loss have been linked to very bad and sometimes deadly high blood pressure in the lungs (pulmonary hypertension). It is not known if Belviq XR (lorcaserin extended-release tablets) raises the chance of this health problem. Talk with your doctor.
- Do not take more than what your doctor told you to take. Taking more than you are told may raise your chance of very bad side effects.
- Some people taking drugs like this one have had heart valve problems. Call your doctor right away if you have dizziness, tiredness, or weakness that will not go away; fast heartbeat or a heartbeat that does not feel normal; swelling in your arms or legs; or trouble breathing.
- Call your doctor right away if you have a painful erection (hard penis) or an erection that lasts for longer than 4 hours. This may happen even when you are not having sex. If this is not treated right away, it may lead to lasting sex problems and you may not be able to have sex.
- This medicine may cause harm to the unborn baby if you take it while you are pregnant. If you are pregnant or you get pregnant while taking Belviq XR (lorcaserin extended-release tablets), call your doctor right away.
How is this medicine (Belviq XR) best taken?
Use Belviq XR (lorcaserin extended-release tablets) as ordered by your doctor. Read all information given to you. Follow all instructions closely.
- Take with or without food.
- To gain the most benefit, do not miss doses.
- Keep taking Belviq XR (lorcaserin extended-release tablets) as you have been told by your doctor or other health care provider, even if you feel well.
- Swallow whole. Do not chew, break, or crush.
What do I do if I miss a dose?
- Take a missed dose as soon as you think about it.
- If it is close to the time for your next 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 high blood pressure like very bad headache or dizziness, passing out, or change in eyesight.
- New or worse behavior or mood changes like depression or thoughts of killing yourself.
- Hallucinations (seeing or hearing things that are not there).
- Slow heartbeat.
- Feeling confused.
- Feeling very tired or weak.
- Memory problems or loss.
- Not able to focus.
- Pain when passing urine.
- Passing urine more often.
- Nipple discharge.
- For males, enlarged breasts.
- A very bad and sometimes deadly health problem called serotonin syndrome may happen. The risk may be greater if you take Belviq XR (lorcaserin extended-release tablets) with drugs for depression, migraines, or certain other drugs. Call your doctor right away if you have agitation; change in balance; confusion; hallucinations; fever; fast or abnormal heartbeat; flushing; muscle twitching or stiffness; seizures; shivering or shaking; sweating a lot; very bad diarrhea, upset stomach, or throwing up; or very bad headache.
- A very bad and sometimes deadly health problem called neuroleptic malignant syndrome (NMS) may happen. Call your doctor right away if you have any fever, muscle cramps or stiffness, dizziness, very bad headache, confusion, change in thinking, fast heartbeat, heartbeat that does not feel normal, or are sweating a lot.
What are some other side effects of Belviq XR?
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 tired or weak.
- Feeling sleepy.
- Upset stomach.
- Dry mouth.
- Hard stools (constipation).
- Back pain.
- Loose stools (diarrhea).
- Signs of a common cold.
- Nose and throat irritation.
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 Belviq XR?
- Store at room temperature.
- 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 Belviq XR (lorcaserin extended-release tablets), 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 Belviq XR (lorcaserin)
- Belviq XR Side Effects
- During Pregnancy
- Dosage Information
- Drug Interactions
- Support Group
- Pricing & Coupons
- En Español
- 19 Reviews
- Drug class: anorexiants
Other brands: Belviq