SIDE EFFECTS: Nausea, dry mouth, headache, dizziness, constipation, or tiredness may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly. Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if you have any serious side effects, including: easy bleeding/bruising, enlarged breasts or abnormal breast milk production, mental/mood changes (such as confusion, depression, thoughts of suicide, unusual agitation, difficulty with attention/memory), shaking/twitching muscles, shortness of breath, slow/fast/irregular heartbeat, swelling ankles/feet/hands, unexplained fever. If you are taking medication to treat diabetes, lorcaserin can increase your risk for low blood sugar (hypoglycemia). Symptoms of low blood sugar include sudden sweating, shaking, fast heartbeat, hunger, blurred vision, dizziness, or tingling hands/feet. Tell your doctor right away about the reaction and the use of this product. Your doctor may need to adjust your medication(s). Rarely, males may have a painful or prolonged erection lasting 4 or more hours. If this occurs, stop using this drug and get medical help right away, or permanent problems could occur. A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

PRECAUTIONS: See also Side Effects section. Before taking lorcaserin, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: diabetes, heart problems (such as heart valve disease, heart failure, slow heartbeat, heart block), kidney problems, liver problems, conditions that can increase the risk of prolonged/painful erections in men (such as Peyronie's disease, deformed penis, sickle cell anemia, multiple myeloma, leukemia). This drug may make you dizzy or slow your thinking. Alcohol or marijuana can worsen these effects. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Limit alcoholic beverages. Talk to your doctor if you are using marijuana. Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). If you have diabetes, this product may affect your blood sugar. Check your blood sugar regularly as directed and share the results with your doctor. Tell your doctor right away if you have symptoms of low blood sugar (see Side Effects section). Your doctor may need to adjust your diabetes medication, exercise program, or diet. This medication must not be used during pregnancy. It may harm an unborn baby. Discuss the use of reliable forms of birth control with your doctor. If you become pregnant or think you may be pregnant, tell your doctor right away. It is unknown if this medication passes into breast milk. Because of the possible risk to the infant, breast-feeding while using this drug is not recommended. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. A product that may interact with this drug is: cabergoline. This medication can slow down the removal of other medications from your body, which may affect how they work. Examples of affected drugs include dextromethorphan, among others.

OVERDOSE: If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: hallucinations, feeling "high," feelings of standing next to yourself (disassociation).