What is dosanac gel used for?: A Comprehensive Guide to Diclofenac Gel

October 7, 2025 •

5 min read

Globally, osteoarthritis affects an estimated 300 million people, and a significant portion of them may benefit from topical pain relievers. A product like Dosanac Emulsion Gel, which contains the active ingredient diclofenac, offers a targeted approach for managing inflammation and pain directly at the source.

Quick Summary

Dosanac gel, containing the NSAID diclofenac, is primarily used to treat pain and inflammation associated with osteoarthritis in specific joints. Depending on the concentration, it is also prescribed for actinic keratosis, a skin condition, and soft tissue injuries like sprains and strains.

Key Points

Active Ingredient: Dosanac gel contains diclofenac, a nonsteroidal anti-inflammatory drug (NSAID) used topically for pain and inflammation.
Primary Uses: It is most commonly used for the temporary relief of arthritis pain in joints like the knees, ankles, feet, hands, wrists, and elbows.
Prescription-Strength: A higher concentration prescription gel is used to treat actinic keratosis, a precancerous skin condition.
Localized Action: Topical application delivers the medicine directly to the source of pain, resulting in lower systemic exposure and fewer internal side effects compared to oral NSAIDs.
Administration: Apply the gel to clean, dry skin as directed by a healthcare professional or product instructions, avoiding open wounds or dressings.
Common Side Effects: The most frequent adverse effects are local skin reactions such as dryness, redness, and itching at the application site.
Important Safety Note: All NSAIDs carry a risk of serious cardiovascular and gastrointestinal events, though topical application reduces this risk significantly compared to oral intake.

While the brand name 'Dosanac' may not be universally known, its active ingredient, diclofenac, is widely recognized as a nonsteroidal anti-inflammatory drug (NSAID). Diclofenac gel provides a topical application for pain and inflammation, allowing the medication to be absorbed directly into the affected area rather than traveling through the systemic circulation like an oral pill. This section will delve into the primary uses, mechanism of action, and important considerations for using this medication.

The Primary Uses of Diclofenac Topical Gel

Dosanac gel and other diclofenac topical gels are prescribed or sold over-the-counter for several specific conditions. The appropriate concentration and formulation depend on the ailment being treated.

For Osteoarthritis (OA) Pain

One of the most common uses for diclofenac gel is the temporary relief of arthritis pain in certain joints. Clinical studies have shown that topical diclofenac can be as effective as oral NSAIDs for relieving OA pain, stiffness, and improving physical function, particularly in the hands and knees, but with fewer systemic side effects. It works locally to reduce the inflammation that contributes to arthritic symptoms.

Targeted Joints: Diclofenac gel is indicated for joints in the hands, wrists, elbows, feet, ankles, and knees.
Effective Relief: The anti-inflammatory action helps to reduce swelling and improve mobility over time, though it may take up to 7 days of consistent use for relief to be felt.

For Actinic Keratosis

A higher concentration of diclofenac gel, such as the 3% strength, is prescribed for treating actinic keratosis (AK). AK is a skin condition characterized by rough, scaly patches caused by excessive sun exposure, and it may become cancerous if left untreated.

Mechanism: The exact way topical diclofenac works on AK is not fully understood, but it is believed to inhibit specific enzymes that affect skin cell growth.
Prescription-only: Higher concentration gels for AK are not available over-the-counter and require a doctor's prescription.

For Soft Tissue Injuries

Diclofenac gels are also effective for reducing pain, inflammation, and swelling from soft tissue injuries such as sprains, strains, bruises, and tendonitis. Some formulations may be indicated for these conditions, though over-the-counter versions are generally not.

Acute Pain Relief: Studies have demonstrated that topical diclofenac provides fast pain relief for injuries like ankle sprains.
Inflammation Reduction: It helps manage inflammation at the injury site, aiding in the healing process.

How Diclofenac Gel Works: The Pharmacological Mechanism

As an NSAID, diclofenac works by inhibiting the production of prostaglandins, which are compounds in the body that cause pain and inflammation. By blocking the cyclooxygenase (COX) enzymes responsible for creating these prostaglandins, diclofenac reduces the inflammatory chemicals in the targeted area.

Unlike oral NSAIDs, which affect the entire body and carry higher risks of cardiovascular and gastrointestinal side effects, topical diclofenac delivers the active ingredient locally. This results in lower systemic exposure while still concentrating the medication at the source of the pain and inflammation, providing effective relief with a reduced risk of serious internal complications.

Diclofenac Gel vs. Oral NSAIDs: A Comparison

Choosing between a topical and an oral NSAID depends on the specific condition, patient health, and tolerance for side effects. The table below highlights key differences.


Feature	Topical Diclofenac (Dosanac Gel)	Oral NSAIDs (e.g., ibuprofen)
Application	Applied directly to the skin over the affected joint.	Swallowed as a pill, affecting the whole body.
Site of Action	Localized to the area of application, penetrating into the joint tissues.	Systemic absorption, affecting the entire body.
Pain Relief	Effective for localized arthritis and soft tissue pain.	Effective for a wide range of pain and inflammation issues.
Systemic Side Effects	Lower risk of serious cardiovascular and gastrointestinal issues.	Higher risk of heart attack, stroke, and stomach bleeding, especially with long-term use.
Local Side Effects	Common skin reactions at the application site, such as itching, redness, or dry skin.	Not applicable.
Drug Interactions	Reduced risk due to minimal systemic absorption, but caution is still needed.	Higher risk of interactions with blood thinners, other NSAIDs, and certain blood pressure medications.
Formulations	Available in different strengths, some OTC and others prescription.	Typically available in various over-the-counter and prescription strengths.

Important Considerations and Safety Profile

While topical diclofenac offers a safer alternative for many, it is not without risks and requires careful use.

Always consult your healthcare provider before starting treatment, especially if you have pre-existing health conditions or are taking other medications. For example, it is especially important not to use diclofenac after 20 weeks of pregnancy, as it may harm the fetus.

Application Instructions

Use a dosing card to measure the correct amount of gel for the specific joint as directed by a healthcare professional or product packaging.
Rub the gel gently into clean, dry skin on the affected area.
Avoid applying the gel to open wounds, infected skin, or rashes.
Do not apply heat or cover the treated area with a bandage.
Wait at least one hour before showering, bathing, or applying other topical products.
Wash your hands thoroughly after each use, unless treating the hands.

Side Effects

The most common side effects are local and include dryness, redness, and itching at the application site. Systemic side effects are less frequent but can still occur, especially with prolonged use or application over a large area. Serious side effects, including cardiovascular events and gastrointestinal bleeding, are rare but possible and should be discussed with a doctor.

Conclusion

Dosanac gel, and its generic diclofenac counterparts, is a valuable topical medication for localized pain and inflammation relief, particularly for osteoarthritis and certain skin conditions. Its targeted approach minimizes systemic side effects compared to oral NSAIDs, making it a preferred option for many patients with joint pain, especially the elderly and those with co-morbid conditions. However, as with any medication, proper use according to professional guidance and awareness of potential side effects are critical for safe and effective treatment. Consulting with a healthcare provider is the best way to determine if diclofenac gel is the right choice for your condition. For more information, visit the National Institutes of Health (NIH) website for research and resources related to diclofenac and topical treatments.

National Institutes of Health (NIH)

Frequently Asked Questions

Dosanac gel and Voltaren gel both contain the same active ingredient, diclofenac sodium, and are used for similar purposes, primarily arthritis pain relief. Voltaren is a well-known brand name for diclofenac gel, and Dosanac is another brand name, potentially available in different regions or as a generic version.

While topical diclofenac is effective for soft tissue injuries like sprains and strains, some over-the-counter products are specifically formulated only for arthritis pain. You should consult your doctor to ensure you are using a formulation suitable for your specific injury.

You should apply the gel to clean, dry skin as directed by a healthcare professional or the product instructions, which may involve using a dosing card. Rub it in gently until it is fully absorbed, and avoid applying it to damaged or open skin. Wait at least one hour before showering or covering the area with clothing.

Long-term use should be discussed with a doctor, as there is still a risk of systemic side effects, although lower than with oral NSAIDs. Your doctor may need to monitor your blood pressure and kidney function if using the gel for an extended period.

It is especially important to avoid using diclofenac during the last trimester of pregnancy (20 weeks or later) unless specifically directed by a doctor, as it can cause problems for the unborn child. Always consult a healthcare professional before use if you are pregnant or breastfeeding.

Although the risk is lower than with oral NSAIDs, topical diclofenac still carries a 'black box' warning for potentially serious cardiovascular events (heart attack, stroke) and gastrointestinal issues (bleeding, ulcers). The most serious side effects are rare, but it's crucial to be aware of the risks.

Yes, lower concentrations of diclofenac gel are available over-the-counter in some regions, typically for arthritis pain. Higher concentrations often require a prescription.