Diclofenac

Diclofenac Full Name

Diclofenac

Diclofenac Introduction

Diclofenac is a prominent member of the non-steroidal anti-inflammatory drug (NSAID) class, widely used for its potent analgesic, anti-inflammatory, and antipyretic properties. Its chemical name is 2-[2-(2,6-dichloroanilino)phenyl]acetic acid. As a phenylacetic acid derivative, it functions primarily by being a non-selective inhibitor of cyclooxygenase (COX) enzymes, particularly COX-1 and COX-2. These enzymes are crucial for the synthesis of prostaglandins, which are key mediators of pain, inflammation, and fever. Diclofenac is typically administered as its sodium or potassium salt to enhance solubility and absorption.

Figure 1. Strcuture of diclofenac.

Primary Medical Uses and Indications
Diclofenac is prescribed for a broad spectrum of conditions involving pain and inflammation. Its major indications include the management of osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, and acute musculoskeletal disorders like sprains and strains. It is also effectively used to treat acute gout attacks, renal colic, postoperative pain, and migraine. Available in various formulations—such as oral tablets, topical gels, patches, eye drops, and injectable solutions—it allows for tailored treatment routes depending on the condition's nature and location, balancing systemic effects with targeted delivery.

Mechanism of Action at the Molecular Level
The therapeutic effects of diclofenac are predominantly achieved through the inhibition of the cyclooxygenase (COX) pathway. By competitively blocking the active site of COX-1 and COX-2 enzymes, it significantly reduces the conversion of arachidonic acid into prostaglandin H2, a precursor for other prostaglandins and thromboxanes. This leads to decreased levels of prostaglandins at sites of injury or inflammation, thereby alleviating pain, swelling, and fever. Notably, diclofenac may exhibit a certain degree of preference for inhibiting COX-2 over COX-1, and it also influences other pathways, such as arachidonic acid metabolism via lipoxygenase, which might contribute to its overall efficacy.

Alternate Names for Diclofenac

Diclofenac; dichlofenac; DICLOFENAC FREE ACID; (o-(2,6-dichloroanilino)phenyl)-acetic acid; [2-(2,6-Dichloroanilino)phenyl]-acetic acid; 2-[[2,6-Dichlorophenyl] amino] benzeneacetic acid