Nac Gel: Topical Diclofenac for Targeted Pain Relief
Clinical Reference Standards: CDSCO (Central Drugs Standard Control Organisation), Indian Pharmacopoeia (IP) & WHO | Last Updated: September 2026
When to Call Your Doctor IMMEDIATELY
- Severe allergic reaction: swelling of face, lips, tongue, or throat, difficulty breathing.
- Severe skin reaction: blistering, peeling, or widespread rash.
- Signs of gastrointestinal bleeding: black, tarry stools or vomiting blood.
- Chest pain, shortness of breath, or irregular heartbeat.
- Decreased urine output or swelling in legs.
- Yellowing of skin or eyes (jaundice).
- Severe headache with visual disturbances.
If experiencing severe symptoms, call emergency services immediately.
What is nac gel used for?
This medicine is a topical gel containing diclofenac 2.32% w/w, used to relieve pain and inflammation in conditions like osteoarthritis, rheumatoid arthritis, and soft tissue injuries. It works by inhibiting COX enzymes and reducing prostaglandin production. Apply a thin layer to the affected area 3-4 times daily, and wash hands after use. It is for external use only and should not be applied to broken skin.
- Generic Name: Diclofenac (2.32% w/w)
- Manufacturer: Systopic Laboratories Pvt Ltd
- Form: Allopathy
- Pregnancy Category: Consult doctor
- Prescription Required: Yes
🇮🇳 nac gel के बारे में (Hindi Summary)
उपयोग: यह दवा डिक्लोफेनाक 2.32% w/w जेल है, जिसका उपयोग दर्द और सूजन को कम करने के लिए किया जाता है। यह ऑस्टियोआर्थराइटिस, रूमेटाइड आर्थराइटिस, मोच, और मांसपेशियों के दर्द में प्रभावी है। इसे प्रभावित क्षेत्र पर पतली परत में लगाएं और हाथ धो लें। यह केवल बाहरी उपयोग के लिए है।
साइड इफेक्ट्स: इस दवा के सामान्य दुष्प्रभावों में त्वचा पर जलन, लालिमा, खुजली, या दाने शामिल हैं। ये आमतौर पर हल्के होते हैं और अपने आप ठीक हो जाते हैं। दुर्लभ मामलों में गंभीर एलर्जी प्रतिक्रिया हो सकती है, जैसे सूजन, सांस लेने में कठिनाई। ऐसा होने पर तुरंत डॉक्टर से मिलें।
सुरक्षा सलाह: इस दवा का उपयोग केवल त्वचा पर करें। आंखों, म्यूकस झिल्ली, या खुले घावों पर न लगाएं। उपयोग के बाद हाथ धो लें। उपचारित क्षेत्र को धूप से बचाएं। 14 दिनों से अधिक उपयोग न करें। गर्भवती या स्तनपान कराने वाली महिलाएं डॉक्टर से परामर्श करें।
💊 nac gel Uses & Benefits
[{"condition":"Osteoarthritis","description":"Relieves pain and improves joint mobility in knee, hip, and hand osteoarthritis when applied topically.","evidence":"Well-established"},{"condition":"Rheumatoid arthritis","description":"Provides localized pain relief for joints affected by rheumatoid arthritis.","evidence":"Moderate"},{"condition":"Soft tissue injuries","description":"Reduces pain and inflammation" class="semantic-link" title="Medicines for swelling">swelling associated with sprains, strains, and sports injuries.","evidence":"Well-established"},{"condition":"Localized musculoskeletal pain","description":"Effective for back pain, neck pain, and other localized musculoskeletal conditions.","evidence":"Well-established"},{"condition":"Actinic keratosis","description":"Sometimes used off-label for treating actinic keratosis, a skin condition caused by sun damage.","evidence":"Limited"}]
Off-label uses: [{"condition":"Actinic keratosis","description":"Topical diclofenac gel is sometimes prescribed off-label for actinic keratosis, but this is not its primary use.","evidence":"Limited"}]
Primary treatment for: Osteoarthritis
Also treats: Rheumatoid arthritis, Soft tissue injuries, Localized musculoskeletal pain
📋 Drug Information
| Generic Name(s) | Diclofenac (2.32% w/w) |
| Brand Name | nac gel |
| Manufacturer | Systopic Laboratories Pvt Ltd |
| Packaging / Form | Varies by brand (Allopathy) |
| Therapeutic Class | PAIN ANALGESICS |
| Action Class | NSAID's- Non-Selective COX 1&2 Inhibitors (acetic acid) |
| Route of Administration | Topical |
| Storage | Store at room temperature (15-30°C). Protect from light and moisture. Keep the tube tightly closed when not in use. |
| Shelf Life | 24 months from the date of manufacture. |
| WHO Guideline | Not established from the available information. |
| ICMR Guideline | Not established from the available information. |
👨⚕️ Doctor's Practical Tips
Evidence-based practical advice from experienced clinicians
🔍 Is This Medicine Right for Your Symptom?
Educational reference. Always consult a doctor for diagnosis.
🔬 How This Medicine Works (Pharmacology)
Pharmacokinetics
How It Works
This medicine works by inhibiting the cyclooxygenase (COX) enzymes, specifically COX-1 and COX-2, which are involved in the production of prostaglandins. Prostaglandins are chemicals that mediate inflammation, pain, and fever. By blocking these enzymes, diclofenac reduces the synthesis of prostaglandins, thereby decreasing inflammation and pain at the site of application. When applied topically, diclofenac penetrates the skin and reaches the underlying inflamed tissues, providing localized relief with minimal systemic absorption.
Mechanism Steps
💡 How to Take nac gel
Strength: Topical gel containing diclofenac 2.32% w/w.
Dosage Information
| Adult Dosage | Apply a thin layer of this medicine to the affected area 3-4 times daily, or as directed by your doctor. The amount needed depends on the size of the area being treated. Typically, a 2-4 cm line of gel is sufficient for an area of about 10 cm x 10 cm. Massage gently into the skin until absorbed. Wash your hands after application unless the hands are the treated area. Do not exceed the recommended dose or duration of use without consulting a doctor. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. |
| Pediatric Dosage | Pediatric dosing is not established from available information. Consult a pediatrician. |
| Elderly Dosage | Elderly patients may be more susceptible to side effects. Use the lowest effective dose for the shortest duration necessary. Consult a doctor for appropriate dosing. |
| Renal Impairment | No dosage adjustment is typically required for topical use, but caution is advised in patients with severe renal impairment. Consult a doctor. |
| Hepatic Impairment | No dosage adjustment is typically required for topical use, but caution is advised in patients with severe hepatic impairment. Consult a doctor. |
| Maximum Daily Dose | The maximum recommended daily dose for topical diclofenac gel is not well established, but generally, application should not exceed 4 times daily or cover more than a certain area. Follow your doctor's instructions. |
Dosage Timeline
🍽️ Food Timing Guide
⏰ What to Do If You Miss a Dose
⚠️ Side Effects of nac gel
✅ Common Side Effects
🚨 Serious Side Effects
⚠️ Rare Side Effects
Consult your doctor if you experience any unusual symptoms.
🔬 Drug Interactions
| Drug | Severity | Effect |
|---|---|---|
| Warfarin | Major | |
| Methotrexate | Major | |
| Oral NSAIDs | Major | |
| ACE inhibitors | Moderate | |
| Diuretics | Moderate | |
| Lithium | Moderate | |
| Corticosteroids | Moderate | |
| Aspirin | Minor | |
| Topical corticosteroids | Minor |
🚨 Major Interactions
- Oral NSAIDs (e.g., ibuprofen, naproxen)
- Anticoagulants (e.g., warfarin)
- Methotrexate
⚡ Moderate Interactions
- Antihypertensives (e.g., ACE inhibitors, diuretics)
- Corticosteroids
- Lithium
🍷 Alcohol Interaction
Alcohol may increase the risk of gastrointestinal bleeding when used with NSAIDs, although this risk is lower with topical diclofenac. It is advisable to limit alcohol consumption while using this medicine.
🔎 Check Your Other Medicines
Educational tool. Always confirm with your doctor or pharmacist.
🛡️ Safety & Warnings
🚫 Contraindications
["Hypersensitivity to diclofenac or any other component of the gel.","History of asthma, urticaria, or allergic-type reactions after taking aspirin or other NSAIDs.","Application on broken, infected, or inflamed skin.","Third trimester of pregnancy.","Children under 14 years of age (unless directed by a doctor)."]
⚠️ Warnings & Precautions
["For external use only. Do not ingest.","Avoid contact with eyes and mucous membranes.","Do not apply to large areas of skin or use for prolonged periods without medical advice.","Avoid concurrent use with oral NSAIDs unless directed by a doctor.","Use with caution in patients with a history of gastrointestinal ulcers or bleeding.","Use with caution in elderly patients who are more prone to side effects.","Discontinue use if skin irritation develops.","Avoid exposure of treated areas to sunlight or UV lamps."]
🤱 Lactation Safety
It is not known whether diclofenac is excreted in human milk after topical application. However, systemic absorption is low. Consult your doctor before using this medicine while breastfeeding.
💊 Overdose Management
Overdose with topical diclofenac is unlikely due to low systemic absorption. If accidental ingestion occurs, seek medical attention immediately. Symptoms of overdose may include nausea, vomiting, abdominal pain, and drowsiness. Treatment is supportive and symptomatic.
⏰ Missed Dose
If you miss a dose, apply it as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not apply a double dose to make up for a missed one.
Additional Safety Advice
This medicine is for external use only. Apply it only to intact skin and avoid contact with eyes, mucous membranes, or open wounds. Wash your hands thoroughly after applying the gel, unless your hands are the treated area. Do not cover the treated area with airtight dressings or heat pads, as this can increase absorption and the risk of side effects. Avoid exposure of the treated area to sunlight or tanning beds to prevent photosensitivity reactions. Do not use this medicine for more than 14 days without consulting a doctor. If you are pregnant, planning to become pregnant, or breastfeeding, consult your doctor before using this medicine. Keep this medicine out of the reach of children. Do not use this medicine if you are allergic to diclofenac, aspirin, or other NSAIDs. If you experience any signs of an allergic reaction, stop use and seek medical help immediately.
👴 Special Considerations for Elderly
💡 For Patients Above 65
Elderly patients may be more susceptible to side effects, especially skin reactions and systemic effects if the gel is used on large areas. Use the lowest effective dose for the shortest duration. Monitor for signs of gastrointestinal bleeding or renal impairment.
🤰 Pregnancy Planning (TTC)
If you are planning to become pregnant, consult your doctor before using this medicine. NSAIDs like diclofenac may affect ovulation and are generally avoided during pregnancy, especially in the third trimester.
🏥 Post-Surgery Considerations
After surgery, consult your surgeon before using this medicine on surgical wounds. It should not be applied to broken or healing skin unless specifically directed. It may be used on intact skin near the surgical site for pain relief, but follow your doctor's instructions.
🦷 Dental Procedures
This medicine is not typically used for dental pain. If you have dental procedures, inform your dentist about all medications you are using. For dental pain, consult your dentist for appropriate treatment.
💚 Lifestyle Tips for Better Results
🏋️ Exercise Considerations
While using this medicine, you can continue with your regular exercise routine, but avoid strenuous activities that may exacerbate your condition. If you experience increased pain or discomfort, stop and consult your doctor. Low-impact exercises like walking, swimming, and stretching are generally safe.
🥗 Diet Recommendations
💼 Impact on Daily Work & Life
This medicine is applied topically and is unlikely to affect your ability to drive or operate machinery. However, if you experience dizziness or drowsiness (rare), avoid these activities until you feel alert. You can continue your normal daily activities while using this medicine, but avoid exposing treated areas to excessive sunlight or heat.
🛑 When to Stop This Medicine
Stop using this medicine and consult your doctor if your symptoms do not improve after 7 days, if they worsen, or if you experience any severe side effects such as skin reactions or allergic symptoms. Do not stop prescribed treatment without consulting your doctor.
📅 Long-Term Use Effects
Long-term use of this medicine is generally safe when used as directed. However, prolonged use over large areas may increase the risk of systemic side effects such as gastrointestinal or renal issues. It is advisable to use the lowest effective dose for the shortest duration necessary. Regular monitoring by a healthcare professional is recommended if used for extended periods.
🌿 Non-Medicine Approaches
These can complement medicine but do not replace prescribed treatment.
Can complement medicine for chronic pain and improve joint function.
Evidence: Well-establishedMay help reduce pain in some individuals with osteoarthritis.
Evidence: ModerateApplying heat or cold packs can help reduce pain and inflammation.
Evidence: Well-established💉 Vaccination Considerations
💉 If You're Getting Vaccinated
There are no known interactions between this medicine and vaccines. You can receive vaccinations while using this medicine.
📦 Storage Guide
✅ DO
Store at room temperature (15-30°C)
❌ DON'T
Do not refrigerate unless specified
✅ DO
Keep in original container
❌ DON'T
Do not transfer to unmarked containers
✅ DO
Keep away from direct sunlight
❌ DON'T
Do not store in bathroom cabinet
✈️ Traveling with This Medicine
When traveling with this medicine, keep it in its original packaging with the prescription label intact. Carry a copy of your prescription in case of customs checks. Store it at room temperature and protect it from extreme heat or cold. If you are flying, pack it in your carry-on luggage to avoid temperature fluctuations in checked baggage. There are no specific time zone adjustments needed for topical use, but continue your regular application schedule as much as possible.
💰 Cost Analysis & Savings
👥 Real Patient Stories
Educational, anonymized scenarios. Individual results may vary.
💬 Questions Patients Often Ask
A: This medicine typically starts providing pain relief within 30 minutes to 1 hour after application, but full anti-inflammatory effects may take several days of regular use.
A: This medicine is not recommended for use on the face unless specifically directed by a doctor. Avoid contact with eyes and mucous membranes.
A: This medicine is not recommended for children under 14 years of age unless directed by a doctor. Consult a pediatrician for appropriate treatment.
A: Consult your doctor before using this medicine during pregnancy, especially in the third trimester, as NSAIDs may pose risks to the fetus.
A: Rinse your eyes thoroughly with water and seek medical attention if irritation persists.
🤔 Common Patient Concerns
🛑 Myths vs. Facts
- Myth: This medicine can be used on any skin wound.
Fact: This medicine should only be applied to intact skin. Applying it to broken or infected skin can cause irritation and increase absorption. - Myth: More gel means faster relief.
Fact: Using more than the recommended amount does not provide faster relief and may increase the risk of side effects. - Myth: This medicine is completely free of side effects because it is topical.
Fact: While side effects are less common than with oral NSAIDs, skin reactions and, rarely, systemic effects can occur.
🔄 Alternative Options
Generic Alternatives
- Diclofenac topical gel
Brand Alternatives
- Voltaren
- Voveran