Qsymia

Medically Reviewed by Dr. Harshi Dhingra, M.D.

Last Reviewed: Aug 26, 2025

Side Effects


Qsymia Side Effects

Possible side effects of Qsymia are listed below. Tell your doctor if these side effects are severe or do not go away in a few days.

  • Dizziness
  • Headache
  • Unusual sensations such as numbness, tingling, or burning in the face, hands, or feet
  • Decreased sensations such as touch
  • Insomnia (difficulty falling asleep or staying asleep)
  • Cognitive dysfunction (difficulty remembering things, concentrating, paying attention, or thinking)
  • Unusual fatigue
  • Excessive thirst
  • Dry mouth
  • Changes in taste
  • Heartburn
  • Nausea
  • Constipation
  • Diarrhea
  • Pain during menstrual periods
  • Back pain, neck pain
  • Muscle pain or muscle tightening
  • Urinary problems (pain or difficulty with urination, frequent urination)
  • Signs of infection (fever, sore throat, congestion, cough)
  • Hair loss

Rarely, Qsymia can cause more serious side effects. Call your doctor without delay or seek emergency medical care if you develop the following symptoms:

  • Skin rash, hives, itching, blistering, or peeling skin
  • Racing or pounding heartbeat
  • Eye pain, eye redness, or sudden decreased vision
  • Fast or shallow breathing
  • Severe back pain or flank (side) pain
  • Blood in urine

The above list may not include all the potential adverse effects of Qsymia. Contact your healthcare professional if your side effects are unusual or severe or they do not get better over time. You can also report unusual side effects to the Food and Drug Administration at 1-800-FDA-1088.

Qsymia Overdose: In case of an overdose of Qsymia, call your doctor immediately. You can also call the local poison control center or the National Poison Control Center at 1-800-222-1222. If a person cannot be awakened, has trouble breathing, has collapsed, or has had a seizure, call 911. Signs and symptoms of an overdose of Qsymia may include restlessness, confusion, uncontrolled shaking, fast breathing, panic, aggression, hallucinations, irregular heartbeat, stomach cramps, nausea, vomiting, diarrhea, drowsiness, dizziness, vision changes, speech disturbance, or problems with coordination.

Source: FDA