Diclofenac: Uses, Dosage, Side Effects, and Safety Information

Diclofenac is a nonsteroidal anti-inflammatory drug (NSAID) used to ease pain and inflammation. It’s often prescribed for conditions like arthritis, sprains, and other joint or muscle issues. Diclofenac works by blocking enzymes in your body that produce chemicals (prostaglandins) responsible for inflammation, pain, and fever. This guide covers diclofenac uses, dosage, side effects, precautions, drug interactions, use in pregnancy, brand names and its approximate price in India.

At a Glance

Diclofenac Boxed Warnings and Formulation-Specific Risk

Cardiovascular risk: NSAIDs, including diclofenac, can increase the risk of serious and potentially fatal heart attack or stroke. This risk can occur early in treatment and may increase with longer use or higher doses. Diclofenac should not be used for pain around the time of coronary artery bypass graft (CABG) surgery. People with existing heart disease or risk factors may be at greater risk.

Gastrointestinal risk: NSAIDs, including diclofenac, can cause serious stomach or intestinal bleeding, ulcers, and perforation, which can be fatal. These can happen at any time during use, sometimes without any warning symptoms. Older adults and people with a prior history of ulcers or GI bleeding are at higher risk.

Topical diclofenac gel: Topical diclofenac generally has significantly lower systemic absorption than oral or injectable diclofenac, since it’s applied directly to the skin over the painful area rather than taken internally. This does not mean topical gel is risk-free depending on the specific product, its labeling contains important safety information regarding cardiovascular, gastrointestinal, kidney, liver, and skin-related risks, and the level of risk can differ from oral diclofenac. Always check the safety information for your specific topical product rather than assuming it’s identical to the oral form.

What Is Diclofenac Used For?

Doctors commonly recommend diclofenac for several conditions involving pain or inflammation, including:

• Osteoarthritis: Helps manage joint pain and stiffness.
• Rheumatoid Arthritis: Eases inflammation in the joints, reducing pain and swelling.
• Ankylosing Spondylitis: Provides relief from the symptoms of this spinal inflammation.
• Acute Pain: Often used for short-term pain, like after surgery or minor injuries.
• Migraines: Certain diclofenac formulations, like oral powders, can relieve migraine symptoms.

Different Ways to Take Diclofenac

• Oral Tablets: Dosing varies by formulation, strength, the condition being treated, and treatment duration — different diclofenac formulations and brands are not interchangeable at the same dose. As a general principle, diclofenac should be used at the lowest effective dose for the shortest duration your doctor prescribes, rather than a fixed universal amount.
• Topical Gel: Applied directly over the painful area, usually for localized issues like knee or hand pain. Some diclofenac sodium 1% gel products have a maximum daily amount (commonly up to 32 g per day spread across all treated joints, using the dosing card provided) this figure applies to that specific type of product and may not apply to every topical diclofenac formulation. Always follow the specific product label and dosing card for the exact product you’re using; using more than directed hasn’t been studied and isn’t recommended.
• Injections: Given in medical settings for fast pain relief.

Stick to your doctor’s instructions and the specific product label to get the most benefit and avoid side effects.

Possible Side Effects of Diclofenac

• Digestive Troubles: Nausea, upset stomach, or diarrhea might occur. Long-term use can increase the risk of stomach ulcers or bleeding (see above).
• Heart Concerns: See above this risk isn’t limited to “higher doses over a long period”; it can occur early in treatment too.
• Liver and Kidney Health: Liver and kidney function may need monitoring, particularly with longer-term use or in people who already have liver or kidney disease or other risk factors. Not every patient needs the same monitoring frequency your doctor will determine what’s appropriate for your situation. Seek medical attention for yellowing of the skin or eyes, dark urine, or persistent nausea.
• Fluid retention or worsening heart failure: Diclofenac can cause fluid retention and swelling; use with caution if you have heart failure or high blood pressure.
• Skin reactions: Rarely, diclofenac (especially topical forms) can cause a serious skin reaction. Seek medical attention for a rash, blistering, or peeling skin.

Contact your doctor immediately if you experience severe side effects like chest pain, difficulty breathing, black or bloody stools, intense stomach pain, or sudden weakness/slurred speech.

Diclofenac Drug Interactions

• Other NSAIDs or aspirin: Combining diclofenac with another NSAID (including OTC ones like ibuprofen) or regular aspirin use increases the risk of GI and other side effects and should only be done if specifically advised by your doctor.
• Combining topical and oral/systemic NSAIDs: Using topical diclofenac gel together with an oral or injectable NSAID can increase your overall NSAID exposure and related risks, even though the gel itself has lower absorption. Only combine these if specifically advised by a doctor.
• Blood thinners (anticoagulants): Diclofenac can increase bleeding risk when combined with these.
• ACE inhibitors, ARBs, or diuretics (blood pressure medicines): Diclofenac may reduce their effectiveness and increase the risk of kidney problems, especially when combined.
• Lithium and methotrexate: Diclofenac can raise blood levels of these medicines, increasing the risk of their side effects.
• Corticosteroids: Combined use increases the risk of GI ulcers and bleeding.

Always tell your doctor or pharmacist about all medicines, supplements, and over-the-counter products you’re taking before starting diclofenac, including topical forms.

Who Should Avoid Diclofenac?

Contraindicated:

• Use around the time of coronary artery bypass graft (CABG) surgery
• History of asthma, hives, or other allergic-type reactions after taking aspirin or other NSAIDs
• Known hypersensitivity to diclofenac

Active gastrointestinal bleeding is a serious condition requiring prompt medical evaluation — diclofenac should not be started or continued in this situation without your doctor’s specific assessment.

Important precautions use with caution, or avoid unless your doctor advises otherwise, if you have:

• A history of stomach ulcers or GI bleeding
• Serious liver or kidney problems
• Uncontrolled high blood pressure, heart failure, or other significant cardiovascular disease

Using Diclofenac Safely During Pregnancy and Health Conditions

• Pregnancy: NSAIDs, including diclofenac, should generally be avoided from around 20 weeks of pregnancy onward unless specifically advised by a healthcare professional, due to the risk of fetal kidney problems and low amniotic fluid. This doesn’t mean use earlier in pregnancy is automatically safe — diclofenac should only be used before 20 weeks if a doctor determines the potential benefit justifies the risk. From around 30 weeks and later, NSAIDs should generally be avoided altogether because of additional risks to the baby’s cardiovascular system.
• Liver and Kidney Concerns: If you already have liver or kidney issues, make sure your doctor is closely monitoring you while using diclofenac.

When Should You See a Doctor?

Contact a doctor promptly, or seek emergency care, if you experience:

• Severe or persistent pain that isn’t improving
• Black or bloody stools, or vomiting blood
• Chest pain, breathing difficulty, sudden weakness, or slurred speech
• Severe stomach pain
• Significant swelling or reduced urine output
• A serious rash, blistering, or peeling skin
• You’re pregnant, or unsure whether diclofenac is safe for you
• You feel you need diclofenac for longer than your doctor advised

Popular Diclofenac Brands in India and the U.S.

• In India: Voveran, Diclomax, Zerodol
• In the United States: Voltaren, Cataflam, Zorvolex

Formulations, strengths, and availability can vary by brand and country always stick to the specific brand, strength, and dosing schedule your doctor recommends.

Diclofenac Price in India

Voveran 50 GE Tablet (diclofenac 50 mg, gelatin-coated), strip of 10: approximately ₹90–₹95.

Prices may vary by brand, strength, formulation, pack size, pharmacy, location, and available discounts.

How HealthPil Can Help

Struggling with pain can be tough, but finding the right treatment shouldn’t be. At HealthPil, our doctors can help you decide if diclofenac is the best option for your condition or if another approach might suit you better. Schedule a consultation to discuss your treatment options.