Diclofenac: Uses, Dosage, Forms, and Cost Savings Guide

 Medically reviewed by Austin Ulrich, PharmD

Key Takeaways

• Diclofenac is a non-steroidal anti-inflammatory drug (NSAID) used to treat mild-to-moderate pain, osteoarthritis, and rheumatoid arthritis.
• It is prescribed as oral tablets (immediate and extended-release), topical gels, liquids, and patches to target pain differently.
• Prescription discount programs like the Super+ RX coupon can help you save money on diclofenac and other prescriptions.

Estimated Price Comparison

The following table illustrates the potential savings when using the generic version of diclofenac and using a discount method like Super+ RX.

Medication Name	Estimated Average Retail Price	Estimated Super+ RX Member Price
Diclofenac Sodium 1% (Over-the-Counter Topical Gel, Generic)	~$15.00 – $22.00	~$2.00 – $4.00
Diclofenac Sodium 3% (Topical Gel, Generic)	~$30.00 – $60.00	~$10.00 – $25.00
Diclofenac Potassium (Tablet/Capsule, Generic)	~$250.00 – $1,000.00+	~$130.00 – $700.00
Diclofenac Epolamine (Topical Patch, Generic)	~$300.00 – $600.00	~$130.00 – $350.00
Flector (Topical Patch, Brand)	~$600.00 – $1,000+	~$350.00 – $900.00

Diclofenac is a potent nonsteroidal anti-inflammatory drug (NSAID) widely prescribed to manage pain and inflammation. It works by reducing hormones that cause inflammation and pain in the body. While it is often compared to over-the-counter (OTC) NSAIDs like ibuprofen or naproxen, diclofenac is generally considered stronger and is frequently used for chronic conditions where standard OTC options may not provide sufficient relief. However, one diclofenac product, diclofenac sodium topical gel 1% (and brand name Voltaren Arthritis Pain topical gel 1%), is available OTC.

For millions of Americans managing chronic conditions like osteoarthritis or rheumatoid arthritis, this medication serves as a vital tool in maintaining mobility and quality of life. Unlike opioids, which mask pain signals in the brain, NSAIDs like diclofenac target the biological source of the pain—inflammation—at the site of the injury or joint damage.

How Diclofenac Works

The mechanism of action for diclofenac involves blocking cyclooxygenase (COX) enzymes (proteins). These enzymes, specifically COX-1 and COX-2, are responsible for producing prostaglandins. Prostaglandins are lipid compounds that trigger the inflammatory response, causing pain, fever, and swelling at the site of tissue damage or infection.

By blocking these enzymes, diclofenac reduces the production of prostaglandins. This leads to a reduction in swelling and a decrease in pain signals sent to the brain. Because it targets the inflammatory process itself, it is particularly effective for conditions characterized by joint stiffness, swelling, and redness.

FDA-Approved Uses

Healthcare professionals prescribe diclofenac to treat a variety of conditions. The specific use often depends on the form of the medication (oral vs. topical) and your medical history. Common FDA-approved indications include:

• Osteoarthritis: The degeneration of joint cartilage and the underlying bone, most common from middle age onward.
• Rheumatoid Arthritis: A chronic inflammatory disorder affecting many joints, including those in the hands and feet.
• Ankylosing Spondylitis: An inflammatory arthritis affecting the spine and large joints.
• Migraines: Specific formulations (powder for oral solution) are approved for the acute treatment of migraine attacks.
• Actinic Keratosis: A topical gel formulation is used to treat this rough, scaly patch on the skin caused by years of sun exposure.
• Mild to Moderate Pain: General relief for relief from acute injury or post-operative pain.
• Dysmenorrhea: Relief from menstrual cramps and pain.

Diclofenac Sodium vs. Diclofenac Potassium vs. Diclofenac Epolamine

You may notice different chemical names on prescription labels: diclofenac sodium, diclofenac potassium, and diclofenac epolamine. While the active medication is the same, the salt form affects how the body absorbs it.

• Diclofenac Potassium: This form is more soluble in water, allowing it to dissolve and enter the bloodstream faster. It is typically used for acute conditions where rapid pain relief is required, such as dental pain, migraines, or immediate injury.
• Diclofenac Sodium: This form is absorbed slightly more slowly. It is commonly used in delayed-release or extended-release tablets for chronic conditions like arthritis, where maintaining a steady level of the medication in the bloodstream is more important than immediate onset.
• Diclofenac Epolamine: This form of diclofenac has good solubility in water and in tissues, which helps it penetrate through the skin. This form of diclofenac is used in transdermal patches.

How to Save on Your Diclofenac Prescription

Here are several practical ways you can save money if you need a prescription for diclofenac — whether you have insurance or not:

• Use a prescription discount card or coupon like Super+ RX: The Super+ RX coupon uncovers discounts to help lower out-of-pocket costs for diclofenac. Whether it’s diclofenac or another medication, we want to help you save—because your well-being comes first.
• Check multiple pharmacies — cash prices can vary. Pharmacies in the same area sometimes charge different prices for the same medication. Comparing cash prices among pharmacies can help you find the cheapest option. Search for your prescription on Super.com/rx, compare prices across pharmacies, and find discounts near you.
• Consider asking for the generic form, not the brand-name form. The generic versions of diclofenac are often much cheaper than the brand-name versions,  and work the same.

What you can do before you go to the pharmacy:

• Use a discount program like the Super+ RX coupon — print it or bring it on your phone — and ask the pharmacist or cashier to apply it to your prescription.
• Compare at least two or three pharmacies on Super.com/rx to see who offers the lowest price.
• If you are uninsured or if you have a high copay, ask your healthcare team about patient-assistance programs or reduced-cost clinics in your area.

Ready to save on diclofenac? Compare prices for diclofenac at pharmacies near you and start lowering your medication costs.

Forms and Dosages

One of the reasons diclofenac is so widely used is the variety of forms in which it is available. This versatility allows healthcare professionals to tailor treatment to your specific needs, balancing pain relief with the risk of side effects.

Oral Tablets and Capsules

Oral administration is the most common route for body-wide relief. These tablets come in various release mechanisms designed to control how the medication is delivered to your system.

• Delayed-Release Tablets: These are designed to pass through the stomach before dissolving in the small intestine. This coating helps protect the stomach lining from irritation, a common side effect of NSAIDs. Common dosages include 25 mg, 50 mg, and 75 mg.
• Extended-Release Tablets: These are formulated to release the medication slowly over a prolonged period. This is ideal if you have chronic conditions and need 24-hour relief without taking multiple pills a day. A common dosage is 100 mg taken once daily.
• Immediate-Release Tablets: Primarily found in the potassium salt form, these are used when speed is the priority. Dosages are typically 25 or 50 mg one or more times per day.

Topical Gel (Diclofenac Sodium Topical Gel)

Topical diclofenac has surged in popularity, particularly for older adults or those with sensitive stomachs. Sold under brand names like Voltaren (and now available OTC in lower strengths—1%), the gel allows you to apply the medication directly to the painful joint.

• 1% Gel: Used primarily for osteoarthritis in joints amenable to topical treatment, such as the knees and hands. It is generally not recommended for use on the spine, hip, or shoulder due to the depth of those joints.
• 3% Gel: Specifically indicated for the treatment of actinic keratosis (a skin condition) rather than joint pain.

The primary benefit of the topical gel is safety. Because the medication is absorbed locally through the skin rather than being digested, the levels of the medication in the bloodstream are significantly lower. This reduces—but does not entirely eliminate—the risk of gastrointestinal ulcers and other systemic side effects.

Topical Solutions and Patches

• Topical Solution (Liquid): Often prescribed for osteoarthritis of the knee. It contains a penetration enhancer to help the medication cross the skin barrier.
• Transdermal Patch: A patch applied directly to the site of acute pain, such as a sprain or strain. It provides continuous release of the medication to the local area.

Dosage Considerations

Dosage is highly individualized. A healthcare professional will typically seek the “lowest effective dose for the shortest duration possible” to minimize cardiovascular and gastrointestinal risks.

• For Osteoarthritis or Rheumatoid Arthritis: A typical oral starting dose might be 50 mg taken two or three times a day, or one 100 mg extended-release tablet daily.
• For Topical Gel: Dosing is measured in grams using a dosing card supplied with the tube. Upper body joints (hands, elbows, wrists) typically require 2 grams per application, while lower body joints (knees, ankles, feet) require 4 grams.

Safety Profile: Side Effects and Precautions

While diclofenac is effective, it is a potent medication that can cause side effectsn. Like all NSAIDs, it carries specific warnings you should understand before starting treatment.

Common Side Effects

Most side effects are mild and related to the digestive system (for oral forms). These can often be managed by taking the medication with food or milk.

• Indigestion, gas, or stomach pain.
• Nausea or vomiting.
• Diarrhea or constipation.
• Headache or dizziness.
• Drowsiness.
• Mild skin rash or itching (more common with topical forms).

Serious Risks and Warnings

Diclofenac, like other prescription NSAIDs, carries an FDA “Black Box Warning”—the strictest warning put on prescription labeling. This alerts healthcare professionals and patients to serious risks:

1. Cardiovascular Risk NSAIDs may increase the risk of serious cardiovascular thrombotic events, myocardial infarction (heart attack), and stroke, which can be fatal. This risk may increase with duration of use and is higher in patients with existing cardiovascular disease or risk factors (such as high blood pressure). Patients who have recently had coronary artery bypass graft (CABG) surgery should not take this medication.

2. Gastrointestinal Risk NSAIDs cause an increased risk of serious gastrointestinal adverse events, including bleeding, ulceration, and perforation of the stomach or intestines, which can be fatal. These events can occur at any time during use and without warning symptoms. Older adults are at greater risk for serious gastrointestinal events.

Liver and Kidney Health

Long-term use of NSAIDs can impact kidney function, potentially leading to kidney injury. People with existing kidney issues, those taking diuretics, and older adults are monitored closely. Additionally, rare but severe liver damage can occur. Healthcare professionals may order blood tests to monitor liver function if you are on the medication for a prolonged period.

Drug Interactions

Diclofenac can interact with other medications, altering their effectiveness or increasing the risk of side effects. It is vital to provide a full medication list to your pharmacist. Notable interactions include:

• Blood Thinners (Anticoagulants): Taking diclofenac with warfarin, rivaroxaban, or aspirin increases the risk of stomach bleeding significantly.
• Other NSAIDs: Taking it alongside ibuprofen, naproxen, or high-dose aspirin increases the risk of side effects without providing additional pain relief.
• Blood Pressure Medication: NSAIDs can reduce the effectiveness of angiotensin-converting enzyme (ACE) inhibitors, angiotensin receptor blockers (ARBs), and diuretics (water pills).
• Lithium and Methotrexate: NSAIDs can increase the side effects of these medications by reducing their removal from the body.
• Certain Antidepressants: Combined with NSAIDs, these can increase the risk of bleeding.

Deep Dive: Topical Diclofenac Gel

For many members of the Super+ RX community, specifically those over 50, topical gel may be a preferred method of administration. It offers a way to treat arthritic knees or hands without subjecting the entire body to the strong effects of oral medication.

How to Apply the Gel Correctly

Proper application is essential for the medication to work. The gel usually comes with a dosing card—a reusable plastic card with lines measuring 2 grams and 4 grams.

• Clean and Dry: Ensure the skin around the joint is clean and dry. Do not apply to open wounds, infections, or skin with a rash.
• Measure: Squeeze the gel onto the dosing card up to the correct line (2g for hands/wrists/elbows, 4g for knees/ankles/feet). Do not rely on eyeballing the amount.
• Apply: Use the card or your hand to rub the gel gently into the entire affected joint area.
• Wash Hands: Unless you are treating your hands, wash your hands immediately after application to avoid accidentally touching your eyes or mouth with the medication. If treating hands, wait one hour before washing them.

Lifestyle Considerations for the Gel

• Wait to Shower: You should avoid showering or bathing for at least one hour after applying the gel to ensure it absorbs fully.
• Avoid Cosmetics: Do not apply lotions, sunscreens, or insect repellents to the same area, as this can affect absorption or cause skin irritation.
• Heat Safety: Do not apply external heat (heating pads) to the treated area. Heat opens pores and increases blood flow, which can cause the body to absorb too much medication too quickly, increasing the risk of systemic side effects.
• Sun Sensitivity: The treated skin may be more sensitive to sunlight. Avoid direct sun exposure or tanning beds to prevent phototoxic reactions.

Why Do Some Healthcare Professionals Prefer Gel?

For older adults, the “systemic burden” of medications can be a major concern. As we age, our kidneys and liver process medications less efficiently. Oral NSAIDs travel through the entire bloodstream, affecting the stomach lining, kidneys, and heart. Topical gel keeps the medication concentrated locally. While some absorption into the bloodstream still happens, it is drastically lower, making it safer for people with complex medical histories.

Frequently Asked Questions

Is diclofenac a strong painkiller? Yes, it is considered a potent NSAID. While it is not an opioid and does not cause the misuse or dependence associated with controlled substances, prescription diclofenac is generally stronger and more effective for deep tissue and joint inflammation than standard OTC doses of ibuprofen or aspirin.

Why do some healthcare professionals hesitate to prescribe oral diclofenac? Healthcare professionals are cautious because of the heart and gastrointestinal risks associated with long-term use. For older adults with heart conditions or a history of ulcers, oral NSAIDs pose real risks. This is often why the topical gel is preferred—it provides relief with less systemic exposure.

How long does it take for diclofenac sodium topical gel to start working? Unlike an oral pill that might work in an hour, the gel can take time to build up in the joint tissues. While some relief may be felt within a day or two, it may take up to 7 days of consistent use (4 times daily) to feel the full benefit for osteoarthritis pain. It is not designed for “instant” relief.

Can I take diclofenac if I am taking blood pressure medication? You should consult your healthcare professional first. NSAIDs can raise blood pressure and reduce the effectiveness of blood pressure medications. If you must take them together, your blood pressure should be monitored closely.

What happens if I miss a dose? If you miss a dose, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and return to your regular schedule. Do not double the dose to “catch up,” as this increases the risk of side effects.

Can I drink alcohol while taking this medication? It is best to avoid or limit alcohol. Both alcohol and NSAIDs can irritate the stomach lining. Combining them increases the risk of stomach bleeding and ulcers.

Is the over-the-counter Voltaren gel the same as the prescription? The OTC version is a 1% strength gel, which is the same strength as the most commonly prescribed version for osteoarthritis. However, if you require higher strengths or different formulations (like the 3% gel for skin conditions), a prescription is still required.

Can I use the gel on my hip or spine? The FDA approval for the 1% gel is specifically for hands, wrists, elbows, knees, ankles, and feet. The hip and spine are deep joints covered by thicker layers of muscle and fat, making it difficult for the topical medication to penetrate effectively. Oral medication is typically prescribed for hip or back pain, but you should discuss options with your healthcare professional.

How to Save

Ready to save on diclofenac? Compare prices for diclofenac at pharmacies near you and start lowering your medication costs.

References

Alfaro RA, Davis DD. Diclofenac. StatPearls. May 22, 2023. Accessed February 16, 2026. https://www.ncbi.nlm.nih.gov/books/NBK557879/

Altman R, Bosch B, Brune K, Patrignani P, Young C. Advances in NSAID development: evolution of diclofenac products using pharmaceutical technology. Drugs. 2015;75(8):859-877. doi:10.1007/s40265-015-0392-z

Diclofenac sodium gel. Prescribing information. Sportpharm LLC, 2026. Accessed February 16, 2026. https://nctr-crs.fda.gov/fdalabel/services/spl/set-ids/929f71ab-f0c8-4331-800d-ed4a172e647e/spl-doc

Ghlichloo I, Gerriets V. Nonsteroidal anti-inflammatory drugs (NSAIDs). StatPearls. May 1, 2023. Accessed February 16, 2026. https://www.ncbi.nlm.nih.gov/books/NBK547742/

Qureshi O, Dua A. Cox inhibitors. StatPearls. February 28, 2024. Accessed February 16, 2026. https://www.ncbi.nlm.nih.gov/books/NBK549795/

Disclaimer:

Generative AI was used in the development of this content. All information in this article has been reviewed by our highly-trained clinicians. We do not provide medical advice. Please, consult a physician.