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Precautions and Warnings With Lorcaserin

To help minimize your risk of problems with lorcaserin, make sure your healthcare provider has a current list of all medications you are taking and a complete medical history. There are many warnings and precautions to be aware of before starting lorcaserin. For example, it's important to be aware of unusual changes in mood, risks of drug interactions, and symptoms of a serious condition called serotonin syndrome.

What Should I Tell My Healthcare Provider?

You should talk with your healthcare provider prior to taking lorcaserin (Belviq®) if you have:
  • Congestive heart failure (CHF)
  • Heart valve problems
  • A slow heart rate (bradycardia)
  • Heart block (a type of arrhythmia)
  • Depression or other mood disorder
  • A history of suicide attempts or thoughts of suicide
  • Diabetes
  • Any problem with the shape of your penis, such as Peyronie's disease
  • Blood cell problems, such as sickle cell anemia, multiple myeloma, or leukemia
  • A history of a painful or prolonged erection that lasted for more than four hours (priapism)
  • Kidney disease, such as kidney failure (renal failure)
  • Liver disease, such as hepatitis, cirrhosis, or liver failure
  • Any allergies, including to foods, dyes, or preservatives.
Also, let your healthcare provider know if you are:
  • Pregnant or thinking of becoming pregnant
  • Breastfeeding.
You should also tell your healthcare provider about all other medications you are taking, including prescription and nonprescription medicines, vitamins, and herbal supplements.
Last reviewed by: Kristi Monson, PharmD
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