DiclofenacOver the counter

Pronounced dye-KLOE-fen-ak

Brand names: Voltaren, Cataflam

Type: NSAID pain reliever · All Pain Relief & Fever Medicines

What Diclofenac is used for

  • Arthritis and joint pain
  • Muscle and back pain
  • Migraine (certain forms)
  • Eye inflammation after surgery (drops)

◆ Kidney note

Can reduce kidney blood flow and cause kidney injury; the gel form has much lower whole-body exposure.

Common side effects

  • Stomach upset
  • Headache
  • Dizziness
  • Skin irritation (gel)

Important cautions

  • Carries a heart attack and stroke risk warning like other NSAIDs, and can cause stomach bleeding
  • Should not be used for pain around the time of heart bypass surgery

How it comes

Tablets, gel, patches, eye drops, injection (hospital). This guide lists forms only — it never lists strengths or doses.

Toxicity lists: Diclofenac also appears on Medicines That Can Harm the Kidneys.

Related medicines — Pain Relief & Fever Medicines

Please note: This page is a patient-education summary, not medical advice, and it deliberately contains no doses. Medicines affect everyone differently — always follow your own prescription and talk to your doctor or pharmacist before starting, stopping or changing any medicine.