Diclofenac: Uses, Dosage & Side Effects

Diclofenac Sodium/Potassium is a NSAID (Acetic Acid) used for Pain, osteoarthritis, rheumatoid arthritis, migraine, dysmenorrhea. Learn about dosage, side effects, and important safety considerations.

11 min read

Quick Facts

Drug Class
NSAID (Acetic Acid)
Primary Indication
Pain, osteoarthritis, rheumatoid arthritis, migraine, dysmenorrhea
Typical Starting Dose
50 mg BID-TID (oral); 75 mg BID (ER)
Maximum Daily Dose
150 mg daily (oral)

What Is Diclofenac Sodium/Potassium?

Diclofenac Sodium/Potassium is a NSAID (Acetic Acid) medication used to manage Pain, osteoarthritis, rheumatoid arthritis, migraine, dysmenorrhea. This agent is available in both prescription and over-the-counter formulations depending on jurisdiction and indication. The medication has been extensively studied and has a well-established safety and efficacy profile when used appropriately. Healthcare providers often select this agent based on patient-specific factors including comorbidities, concurrent medications, and treatment goals.

Patients should understand that pain management is most effective when combined with non-pharmacological approaches including physical therapy, rest, and lifestyle modifications.

How Diclofenac Sodium/Potassium Works
Diclofenac Sodium/Potassium inhibits cyclooxygenase (COX-1 and COX-2), reducing prostaglandin synthesis and thereby decreasing inflammation, pain, and fever. This mechanism provides broad anti-inflammatory and analgesic benefits.

Indications

  • Pain, osteoarthritis, rheumatoid arthritis, migraine, dysmenorrhea
  • Acute musculoskeletal pain
  • Chronic pain conditions
  • Inflammatory joint diseases
  • Headaches and migraines (select agents)
  • Dysmenorrhea
  • Post-operative pain management

Dosage and Administration

Immediate Release: 50 mg BID-TID (oral); 75 mg BID (ER)

Maximum Daily Dose: 150 mg daily (oral)

Duration: Follow prescribing guidelines and healthcare provider instructions. For over-the-counter use, do not exceed 10 days without consulting a healthcare provider.

Special Populations: Elderly patients and those with renal or hepatic impairment may require lower doses or longer dosing intervals. Consult prescribing information for specific guidance.

Clinical Note
Take with food or milk to minimize GI upset. Do not exceed recommended doses. Report signs of GI bleeding (dark stools, vomiting blood) or allergic reactions immediately. Continue only as long as clinically indicated. Use the lowest effective dose for the shortest duration possible.

Side Effects

Common: Nausea, dyspepsia, abdominal pain, headache, dizziness, drowsiness (muscle relaxants)

Serious but Rare: GI bleeding, perforation, acute kidney injury, cardiovascular events, liver dysfunction, anaphylaxis

Warning
Significant GI risk including ulceration and bleeding; among the highest GI risk NSAIDs Increased cardiovascular events and mortality risk with chronic use Potential for acute kidney injury, especially in elderly and volume-depleted patients

CARDIOVASCULAR RISK: This medication may increase the risk of heart attack and stroke, especially with long-term use and in patients with cardiovascular risk factors.

GI RISK: Risk of serious gastrointestinal complications including bleeding and perforation, especially in elderly patients, those with ulcer history, and concurrent corticosteroid or anticoagulant use.

RENAL RISK: May cause acute kidney injury, particularly in patients with existing renal impairment, volume depletion, or heart failure.

For muscle relaxants: Use for acute conditions only (typically 2-3 weeks). Do not drive or operate machinery until effects are known.

Contraindications

  • Severe renal impairment
  • Active GI ulcer disease
  • Hypersensitivity to NSAIDs or aspirin
  • Third trimester of pregnancy
  • Severe heart failure

Drug Interactions

  • ACE inhibitors: reduced antihypertensive effect
  • Diuretics: reduced effectiveness
  • Warfarin: increased bleeding risk
  • Lithium: increased lithium levels
  • Other NSAIDs: additive GI and renal toxicity

Key Clinical Evidence

Clinical evidence supports the use of Diclofenac Sodium/Potassium for acute and chronic pain management in appropriate patient populations. Current evidence-based guidelines recommend individualized treatment approaches considering patient comorbidities and risk factors.

Medically reviewed by

Medical Review Team, Pain Management

Last updated: 2026-02-17Sources: 2

The content on Medical Atlas is for informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider.