Diclofenac Potassium Side Effects

Possible side effects of diclofenac potassium are listed below. Call your doctor if these adverse effects are severe or do not go away in a few days.

• Headache
• Dizziness
• Nausea
• Stomach pain
• Vomiting
• Diarrhea
• Constipation
• Gas or bloating
• Drowsiness
• Tinnitus (ringing in the ears)

Rarely, diclofenac potassium can cause more serious adverse events. Stop using diclofenac potassium and call your doctor right away or seek emergency medical attention if you develop the following symptoms:

• Shortness of breath or difficulty breathing
• Chest pain or chest tightness
• Swelling in the abdomen or limbs
• Sudden or unexplained weight gain
• Unusual tiredness or low energy
• Loss of appetite
• Stomach pain in the right upper part of the abdomen
• Yellowing of the skin or eyes
• Itchy skin
• Fever or flu-like symptoms
• Skin rash, hives, itching, blistering, peeling
• Swelling in the head and neck 
• Hoarseness
• Pale skin
• Fast heartbeat
• Pain or difficulty with urination
• Discolored, bloody, or cloudy urine
• Back pain
• Unusual bleeding or bruising

The above list may not include all the possible side effects of diclofenac potassium. Tell your health care professional if your side effects are unusual or severe or if 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.

Diclofenac potassium Overdose: In case of an overdose, seek immediate medical attention. Call your doctor or the national poison control center on 1-800-222-1222. If a person has trouble breathing, cannot be awakened, is not responding, or has had a seizure, call 911. Signs and symptoms of a diclofenac potassium overdose may include drowsiness, slowed breathing, stomach pain, nausea, vomiting, black tarry stools, coffee grounds in vomit, and loss of consciousness.

Source: FDA