Precautions
Drug information provided by: Merative, Micromedex®
It is very important that your doctor check your progress at regular visits, to make sure that this medicine is working properly. Blood tests may be needed to check for unwanted effects.
Using this medicine while you are pregnant can harm your unborn baby. Use an effective form of birth control to keep from getting pregnant. If you think you have become pregnant while using this medicine, tell your doctor right away.
Make sure your doctor knows about all the other medicines you are using. This medicine may cause serious conditions, such as serotonin syndrome or neuroleptic malignant syndrome (NMS)-like reactions, when taken with certain medicines. Call your doctor right away if you have a fever, confusion, mental changes, restlessness, fast heartbeat, muscle spasms, trouble walking, nausea, vomiting, or diarrhea.
Check with your doctor right away if you have rapid weight gain, swelling of the ankles, feet, or lower legs, or troubled breathing while using this medicine.
This medicine may cause dizziness, drowsiness, trouble in thinking, or poor judgment. Make sure you know how you react to this medicine before you drive, use machines, or do other jobs that require you to be alert or able to think well.
If you develop any unusual and strange thoughts or behavior while you are taking this medicine, be sure to discuss it with your doctor. Some changes may be more unusual and extreme, such as confusion, worsening of depression, hallucinations (seeing, hearing, or feeling things that are not there), suicidal thoughts, and unusual excitement, nervousness, or irritability.
For patients with diabetes: Weight loss may result in an improvement in your condition, but may increase your chance of having hypoglycemia (low blood sugar). You should check your blood sugar more often before taking this medicine and during Belviq® treatment. If you notice any changes in your blood sugar levels, check with your doctor.
If you experience a prolonged or painful erection for 4 hours or more, contact your doctor immediately. This condition may require prompt medical treatment to prevent serious and permanent damage to your penis.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal (e.g., St. John's wort) or vitamin supplements.
Portions of this document last updated: April 01, 2024
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