Diclofenac 3% Gel 100gm

Manufacturer ACTAVIS Active Ingredient Diclofenac Gel (3%)(dye KLOE fen ak) Pronunciation dye KLOE fen ak
WARNING: This drug may raise the risk of heart and blood vessel problems like heart attack and stroke. These effects can be deadly. The risk may be greater if you have heart disease or risks for heart disease. However, it can also be raised even if you do not have heart disease or risks for heart disease. The risk can happen within the first weeks of using this drug and may be greater with higher doses or long-term use. Do not use this drug right before or after bypass heart surgery.This drug may raise the chance of severe and sometimes deadly stomach or bowel problems like ulcers or bleeding. The risk is greater in older people, and in people who have had stomach or bowel ulcers or bleeding before. These problems may occur without warning signs. @ COMMON USES: It is used to treat a precancerous skin problem called actinic keratosis.
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Drug Class
Nonsteroidal Anti-inflammatory Drug (NSAID) - Topical
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Pharmacologic Class
Cyclooxygenase (COX) Inhibitor
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Pregnancy Category
C (1st/2nd trimester), D (3rd trimester)
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FDA Approved
Jan 2000
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DEA Schedule
Not Controlled

Overview

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What is this medicine?

Diclofenac 3% gel is a medicine applied to the skin to treat rough, scaly patches called actinic keratosis. These patches are caused by too much sun exposure and can sometimes turn into skin cancer. The gel helps reduce inflammation and improve the appearance of these skin lesions.
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How to Use This Medicine

Proper Use of This Medication

To use this medication correctly, follow your doctor's instructions and read all the information provided. It is essential to use this medication only as directed.

Application Instructions

Apply this medication only to your skin. Do not take it by mouth.
Keep the medication away from your mouth, nose, and eyes, as it may cause burning.
Wash your hands before and after applying the medication.
Clean the affected area before application and dry it thoroughly.
If you accidentally get the medication in your eyes, rinse them immediately with water. If you experience persistent eye irritation or changes in vision, contact your doctor.

Application Technique

Apply a thin layer of the medication to the affected skin and gently rub it in.
Avoid using sunscreen, insect repellent, or other medications on the treated area.
If you apply the medication to your hand, wait at least 1 hour before washing your hands.
Do not use heat or bandages on the treated area.
Allow the medication to dry for at least 10 minutes before covering the area with clothing or gloves.
Avoid bathing, showering, or swimming for 1 hour after application.
Do not apply this medication to open wounds or infected skin.

Storage and Disposal

Store this medication at room temperature, away from freezing temperatures.
Protect the medication from heat sources.

Missed Dose

If you miss a dose, skip it and resume your regular application schedule unless your doctor instructs you otherwise.
Do not apply a double dose or extra doses to make up for a missed dose.
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Lifestyle & Tips

  • Apply a thin layer of gel to the affected skin area twice a day, as directed by your doctor.
  • Wash your hands thoroughly after applying the gel.
  • Avoid applying the gel to open wounds, cuts, or infected skin.
  • Protect treated areas from sunlight and artificial UV light (e.g., tanning beds) by wearing protective clothing and using sunscreen, as the gel can make your skin more sensitive to the sun.
  • Avoid contact with eyes, nose, mouth, and other mucous membranes. If contact occurs, rinse thoroughly with water.
  • Do not cover the treated area with bandages or dressings unless specifically instructed by your doctor.

Dosing & Administration

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Adult Dosing

Standard Dose: Apply a sufficient amount of gel to cover the lesion area, and apply twice daily to the lesion areas for 60 to 90 days.

Condition-Specific Dosing:

Actinic Keratosis: Apply to affected area twice daily for 60 to 90 days.
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Pediatric Dosing

Neonatal: Not established
Infant: Not established
Child: Not established
Adolescent: Not established
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Dose Adjustments

Renal Impairment:

Mild: No specific adjustment needed for topical application due to minimal systemic absorption. Use with caution if large areas are treated or skin is compromised.
Moderate: No specific adjustment needed for topical application due to minimal systemic absorption. Use with caution if large areas are treated or skin is compromised.
Severe: No specific adjustment needed for topical application due to minimal systemic absorption. Use with caution if large areas are treated or skin is compromised.
Dialysis: Considerations: Minimal systemic absorption, unlikely to require specific adjustments related to dialysis. Monitor for systemic NSAID effects if significant absorption occurs.

Hepatic Impairment:

Mild: No specific adjustment needed for topical application due to minimal systemic absorption.
Moderate: No specific adjustment needed for topical application due to minimal systemic absorption.
Severe: No specific adjustment needed for topical application due to minimal systemic absorption.

Pharmacology

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Mechanism of Action

Diclofenac is a nonsteroidal anti-inflammatory drug (NSAID) that exhibits anti-inflammatory, analgesic, and antipyretic activities. Its mechanism of action, like that of other NSAIDs, is believed to be due to inhibition of prostaglandin synthesis, primarily through the inhibition of cyclooxygenase (COX-1 and COX-2) enzymes. In actinic keratosis, its effect is thought to be related to inhibition of COX-2, which is overexpressed in these lesions.
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Pharmacokinetics

Absorption:

Bioavailability: Approximately 10% of systemic exposure compared to oral diclofenac.
Tmax: Variable, typically 10-24 hours after topical application.
FoodEffect: Not applicable for topical administration.

Distribution:

Vd: Not available for topical application; for systemic, approximately 0.12-0.17 L/kg.
ProteinBinding: Highly protein bound (>99%) to human serum albumin for systemically absorbed drug.
CnssPenetration: Limited systemic penetration, therefore limited CNS penetration.

Elimination:

HalfLife: Approximately 1-2 hours (for systemically absorbed drug); terminal half-life from skin is longer, allowing for twice-daily dosing.
Clearance: Not available for topical application; for systemic, approximately 263 mL/min.
ExcretionRoute: Primarily renal (approximately 60%) and biliary/fecal (approximately 35%).
Unchanged: Less than 1% excreted unchanged in urine.
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Pharmacodynamics

OnsetOfAction: Gradual, clinical improvement typically observed after 30 days of treatment.
PeakEffect: Full therapeutic effect may take 60 to 90 days of continuous treatment.
DurationOfAction: Localized effect, maintained with twice-daily application.

Safety & Warnings

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BLACK BOX WARNING

Nonsteroidal anti-inflammatory drugs (NSAIDs) cause an increased risk of serious cardiovascular thrombotic events, including myocardial infarction and stroke, which can be fatal. This risk may occur early in treatment and may increase with duration of use. Diclofenac is contraindicated in the setting of coronary artery bypass graft (CABG) surgery. NSAIDs cause an increased risk of serious gastrointestinal (GI) 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. Elderly patients and patients with a prior history of peptic ulcer disease and/or GI bleeding are at greater risk for serious GI events. Although systemic exposure to diclofenac from topical application is much lower than from oral administration, these risks cannot be completely excluded.
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Side Effects

Urgent Side Effects: Seek Medical Help Right Away

Although rare, some people may experience severe and potentially life-threatening side effects while taking this medication. If you notice any of the following symptoms, contact your doctor or seek immediate medical attention:

Signs of an allergic reaction: rash, hives, itching, red, swollen, blistered, or peeling skin (with or without fever), wheezing, tightness in the chest or throat, difficulty breathing, swallowing, or talking, unusual hoarseness, or swelling of the mouth, face, lips, tongue, or throat.
Signs of bleeding: vomiting or coughing up blood, vomit that resembles coffee grounds, blood in the urine, black, red, or tarry stools, bleeding from the gums, abnormal vaginal bleeding, unexplained bruises or bruises that enlarge, or uncontrollable bleeding.
Signs of high blood pressure: severe headache or dizziness, fainting, or changes in vision.
Signs of kidney problems: inability to urinate, changes in urine output, blood in the urine, or sudden weight gain.
Signs of high potassium levels: irregular heartbeat, confusion, weakness, lightheadedness, dizziness, feeling faint, numbness or tingling, or shortness of breath.
Skin irritation, chest pain or pressure, rapid heartbeat, shortness of breath, significant weight gain, or swelling in the arms or legs.
Weakness on one side of the body, difficulty speaking or thinking, balance problems, drooping on one side of the face, or blurred vision.
Extreme fatigue or weakness, flu-like symptoms, severe back pain, or abnormal burning, numbness, or tingling sensations.
Severe skin reactions, including Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), and other serious reactions, which can be life-threatening. Seek immediate medical help if you experience red, swollen, blistered, or peeling skin; red or irritated eyes; sores in your mouth, throat, nose, eyes, genitals, or skin; fever; chills; body aches; shortness of breath; or swollen glands.

Other Possible Side Effects

Like all medications, this drug can cause side effects, although many people may not experience any or may only have mild symptoms. If you are concerned about any of the following side effects or if they persist, contact your doctor:

Dizziness or headache
Constipation, diarrhea, stomach pain, upset stomach, or vomiting
Gas or heartburn

This is not an exhaustive list of possible side effects. If you have questions or concerns about side effects, consult your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.
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Seek Immediate Medical Attention If You Experience:

  • Severe skin irritation, redness, burning, itching, or blistering at the application site.
  • Signs of an allergic reaction: hives, rash, swelling of the face, lips, tongue, or throat, difficulty breathing.
  • Unusual bleeding or bruising.
  • Signs of stomach problems: severe stomach pain, black or tarry stools, vomiting blood or material that looks like coffee grounds.
  • Swelling of hands, ankles, or feet.
  • Unexplained weight gain.
  • Changes in urination (less frequent or decreased amount).
  • Chest pain, shortness of breath, weakness on one side of the body, slurred speech (signs of heart attack or stroke, though rare with topical use).
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Before Using This Medicine

Before Taking This Medication: Important Information to Share with Your Doctor

It is crucial to inform your doctor about the following conditions to ensure safe treatment:

Any allergies you have, including allergies to this medication, its components, or other substances, such as foods or drugs. Describe the allergic reaction and its symptoms.
Allergies to aspirin or nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or naproxen.
A history of asthma triggered by salicylate drugs (e.g., aspirin) or NSAIDs.
Presence of certain health conditions, including:
+ Dehydration
+ Gastrointestinal (GI) bleeding
+ Heart failure (weak heart)
+ Kidney disease
+ Liver disease
Recent heart attack.
Current use of other NSAIDs, salicylate drugs (e.g., aspirin), or pemetrexed.
Fertility issues or ongoing fertility evaluation.

Pregnancy and Fertility Considerations:

If you are pregnant, plan to become pregnant, or become pregnant while taking this medication, inform your doctor. This drug may harm an unborn baby if taken after 20 weeks of pregnancy.
Between 20 and 30 weeks of pregnancy, only take this medication if your doctor advises you to do so.
Do not take this medication if you are more than 30 weeks pregnant.

Interactions with Other Medications and Health Conditions:

This list is not exhaustive, and it is essential to discuss all your medications (prescription, over-the-counter, natural products, and vitamins) and health conditions with your doctor and pharmacist.
Verify that it is safe to take this medication with your other medications and health conditions.
* Never start, stop, or change the dose of any medication without consulting your doctor.
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Precautions & Cautions

It is essential to inform all your healthcare providers, including doctors, nurses, pharmacists, and dentists, that you are taking this medication. Regular blood tests, as directed by your doctor, are crucial to monitor your condition.

High blood pressure is a potential side effect of this medication. Ensure that your blood pressure is checked as frequently as advised by your doctor. If you are a smoker, discuss this with your doctor, as smoking may impact your treatment. Additionally, if you have asthma, consult with your doctor, as you may be more sensitive to this medication.

Before consuming alcohol, talk to your doctor to understand any potential risks. It is vital to use this medication only on healthy skin, avoiding any areas with problems. Do not exceed the prescribed dosage, as this may lead to severe side effects. Also, do not use this medication for a longer duration than recommended by your doctor.

To minimize potential risks, avoid exposing the treated area to sunlight. It is crucial to be aware that the use of this medication may increase the risk of heart failure. If you already have heart failure, your risk of heart attack, hospitalization due to heart failure, and death may be higher. Discuss these risks with your doctor.

Furthermore, people who have had a recent heart attack may have a higher risk of heart attack and heart-related death when taking this medication. In fact, studies have shown that individuals taking this medication after a first heart attack were more likely to die within a year compared to those not taking it. If you are taking aspirin to prevent a heart attack, consult with your doctor.

Liver problems, which can be fatal, have been associated with this medication. Be vigilant for signs of liver problems, including dark urine, fatigue, decreased appetite, stomach upset or pain, pale stools, vomiting, or yellowing of the skin and eyes. If you experience any of these symptoms, contact your doctor immediately.

In case of accidental ingestion, this medication can cause harm. If swallowed, promptly call a doctor or a poison control center. This medication is not approved for use in children, so it is essential to discuss any concerns with your doctor.

If you are 60 years or older, use this medication with caution, as you may be more susceptible to side effects. It is also important to note that NSAIDs, like this medication, may affect ovulation, potentially impacting fertility. However, this effect is reversible once the medication is stopped. Discuss any concerns with your doctor.

Finally, if you are breastfeeding, consult with your doctor to weigh the potential risks to your baby.
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Overdose Information

Overdose Symptoms:

  • Overdose with topical diclofenac is unlikely due to minimal systemic absorption. However, if large amounts are ingested or applied to extensive areas of compromised skin, systemic NSAID overdose symptoms may occur:
  • Lethargy, drowsiness
  • Nausea, vomiting, epigastric pain
  • Gastrointestinal bleeding
  • Rarely: hypertension, acute renal failure, respiratory depression, coma

What to Do:

In case of suspected overdose, seek immediate medical attention or call a poison control center (e.g., 1-800-222-1222). Treatment is symptomatic and supportive. Gastric decontamination is generally not necessary for topical overdose.

Drug Interactions

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Contraindicated Interactions

  • In the setting of coronary artery bypass graft (CABG) surgery (due to systemic NSAID risk).
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Major Interactions

  • Anticoagulants (e.g., warfarin): Increased risk of bleeding.
  • Antiplatelet agents (e.g., aspirin, clopidogrel): Increased risk of bleeding.
  • Lithium: Increased lithium levels and potential for toxicity.
  • Methotrexate: Increased methotrexate levels and potential for toxicity.
  • Diuretics (e.g., furosemide, hydrochlorothiazide): Reduced diuretic and antihypertensive effects, potential for renal impairment.
  • ACE inhibitors/ARBs: Reduced antihypertensive effect, increased risk of renal impairment and hyperkalemia.
  • Other NSAIDs (systemic or topical): Increased risk of adverse effects (GI, renal).
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Moderate Interactions

  • Digoxin: Increased digoxin levels.
  • Cyclosporine: Increased risk of nephrotoxicity.
  • Tacrolimus: Increased risk of nephrotoxicity.
  • SSRIs/SNRIs: Increased risk of GI bleeding.
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Minor Interactions

  • Not many specific minor interactions for topical diclofenac due to low systemic absorption. However, general caution with drugs metabolized by CYP2C9/2C19.

Monitoring

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Baseline Monitoring

Skin integrity of application site

Rationale: To ensure gel is not applied to open wounds or infected areas, which could increase systemic absorption or local irritation.

Timing: Prior to initiation of treatment.

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Routine Monitoring

Local skin reactions (e.g., dryness, erythema, scaling, pruritus)

Frequency: Daily, or at each application.

Target: Minimal to no irritation.

Action Threshold: Severe or persistent irritation, blistering, or signs of allergic reaction (e.g., urticaria, angioedema) warrant discontinuation and medical evaluation.

Clinical response of actinic keratosis lesions

Frequency: Monthly, or at follow-up visits.

Target: Reduction in size, number, or severity of lesions.

Action Threshold: Lack of improvement after 60-90 days, or worsening of lesions.

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Symptom Monitoring

  • Skin irritation (redness, itching, burning, dryness, rash, scaling)
  • Photosensitivity (sunburn-like reaction)
  • Signs of systemic NSAID effects (rare with topical use but possible with extensive application or compromised skin):
  • Gastrointestinal symptoms (e.g., abdominal pain, indigestion, black/tarry stools, vomiting blood)
  • Cardiovascular symptoms (e.g., chest pain, shortness of breath, swelling of ankles/feet)
  • Renal symptoms (e.g., decreased urine output, swelling)
  • Unusual bleeding or bruising
  • Allergic reactions (e.g., hives, swelling of face/lips/tongue/throat, difficulty breathing)

Special Patient Groups

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Pregnancy

Diclofenac, like other NSAIDs, should be avoided in the third trimester of pregnancy due to the risk of premature closure of the fetal ductus arteriosus. Use in the first and second trimesters should only occur if the potential benefit justifies the potential risk to the fetus, and at the lowest effective dose for the shortest duration possible. The FDA's Pregnancy and Lactation Labeling Rule (PLLR) advises against NSAID use after 20 weeks gestation due to risk of fetal renal dysfunction and oligohydramnios.

Trimester-Specific Risks:

First Trimester: Limited data, but some studies suggest a potential increased risk of miscarriage and cardiac malformations with NSAID use early in pregnancy. Use with caution.
Second Trimester: Generally considered lower risk than the third trimester, but still caution is advised. Avoid use after 20 weeks gestation due to risk of fetal renal dysfunction and oligohydramnios.
Third Trimester: Contraindicated after 30 weeks gestation due to the risk of premature closure of the fetal ductus arteriosus. Avoid after 20 weeks gestation due to risk of fetal renal dysfunction and oligohydramnios.
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Lactation

Diclofenac is excreted in human milk in small amounts after systemic administration. While systemic absorption from topical application is minimal, caution should be exercised when diclofenac gel is administered to a nursing woman. Consider the developmental and health benefits of breastfeeding along with the mother’s clinical need for diclofenac and any potential adverse effects on the breastfed infant from diclofenac or from the underlying maternal condition.

Infant Risk: Low risk due to minimal systemic absorption, but theoretical risk of adverse effects (e.g., GI irritation) if significant exposure occurs. Monitor infant for any unusual symptoms.
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Pediatric Use

Safety and effectiveness of diclofenac 3% gel for actinic keratosis have not been established in pediatric patients.

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Geriatric Use

No specific dose adjustment is required for elderly patients. However, elderly patients may be more susceptible to the adverse effects of NSAIDs, particularly gastrointestinal bleeding and renal impairment, if significant systemic absorption occurs. Use with caution and monitor for adverse reactions.

Clinical Information

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Clinical Pearls

  • Diclofenac 3% gel (Solaraze) is specifically indicated for the topical treatment of actinic keratosis, not for general pain relief.
  • Treatment typically requires 60 to 90 days for optimal results, and complete healing may not be evident until 30 days after stopping therapy.
  • Patients should be advised to protect treated areas from sun exposure and artificial UV light due to potential photosensitivity.
  • Wash hands thoroughly after applying the gel to avoid accidental transfer to eyes or other sensitive areas.
  • While systemic absorption is low, patients should be monitored for signs of systemic NSAID adverse effects, especially if large areas are treated or skin integrity is compromised.
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Alternative Therapies

  • 5-Fluorouracil topical (e.g., Efudex, Carac)
  • Imiquimod topical (e.g., Aldara, Zyclara)
  • Ingenol mebutate topical (e.g., Picato - Note: Picato was voluntarily withdrawn from market due to safety concerns)
  • Photodynamic therapy (PDT) with aminolevulinic acid (e.g., Levulan Kerastick)
  • Cryosurgery (liquid nitrogen)
  • Curettage and electrodessication
  • Excisional surgery
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Cost & Coverage

Average Cost: $300 - $600 per 100gm tube
Generic Available: Yes
Insurance Coverage: Tier 2 or Tier 3 (Specialty/Non-preferred Brand)
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General Drug Facts

If your symptoms or health issues persist or worsen, it is essential to contact your doctor promptly. To ensure your safety, never share your medication with others or take someone else's medication. This medication is accompanied by a Medication Guide, which is a crucial patient fact sheet. Please read it carefully and review it again whenever you receive a refill. If you have any questions or concerns about this medication, we encourage you to discuss them with your doctor, pharmacist, or other healthcare provider. In the event of a suspected overdose, immediately call your local poison control center or seek emergency medical attention. When seeking help, be prepared to provide detailed information about the overdose, including the medication taken, the amount, and the time it occurred.