Lorcaserin (Oral Route)

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Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

• Anxiety
• Bladder pain
• Bloody or cloudy urine
• Blurred vision
• Body aches or pain
• Chills
• Cold sweats
• Coma
• Confusion
• Cool, pale skin
• Cough
• Depression
• Difficult, burning, or painful urination
• Difficulty with breathing
• Dizziness
• Ear congestion
• Fast heartbeat
• Fever
• Frequent urge to urinate
• Headache
• Increased hunger
• Loss of voice
• Lower back or side pain
• Nasal congestion
• Nausea
• Nightmares
• Pounding in the ears
• Runny nose
• Seizures
• Shakiness
• Slow or fast heartbeat
• Slurred speech
• Sneezing
• Sore throat
• Swelling of the breasts or breast soreness in both females and males
• Unexpected or excess milk flow from the breasts
• Unusual tiredness or weakness

• Bloating or swelling of the face, arms, hands, lower legs, or feet
• Decreased ability to exercise
• Dry mouth
• Flushed, dry skin
• Fruit-like breath odor
• Increased hunger
• Increased sensitivity to sunlight
• Increased thirst
• Increased urination
• Itching, pain, redness, or swelling of the eye or eyelid
• Joint pain
• Loss of consciousness
• Rapid weight gain
• Severe skin rash or hives
• Stomachache
• Sweating
• Swollen glands
• Tingling of the hands or feet
• Trouble with breathing
• Trouble with sleeping
• Unexplained weight loss
• Unusual weight gain or loss
• Vomiting
• Watering of the eyes

• Black, tarry, stools
• Chest pain
• Cough or hoarseness
• Pale skin
• Sores, ulcers, or white spots on the lips or in the mouth
• Swollen glands
• Unusual bleeding or bruising

• Agitation
• Confusion
• Convulsions
• Diarrhea
• High fever
• Increased sweating
• Loss of bladder control
• Overactive reflexes
• Painful or prolonged erection of the penis
• Poor coordination
• Restlessness
• Severe muscle stiffness
• Shivering
• Talking or acting with excitement you cannot control
• Trembling or shaking
• Twitching
• Unusually pale skin

Get emergency help immediately if any of the following symptoms of overdose occur:

• Abdominal or stomach discomfort
• False or unusual sense of well-being
• Seeing, hearing, or feeling things that are not there

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

• Back pain
• Difficulty having a bowel movement (stool)
• Muscle aches

• Decreased appetite
• Difficulty with concentration
• Dry eyes
• Muscle spasms
• Muscle, joint, or bone pain
• Problems with memory
• Rash
• Sleeplessness
• Stress
• Toothache
• Trouble seeing

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

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