Diclofenac and Misoprostol

Diclofenac sodium/misoprostol is indicated for treatment of the signs and symptoms of osteoarthritis or rheumatoid arthritis in adult patients at high risk of developing NSAID-induced gastric and duodenal ulcers and their complications. For a list of factors that may increase the risk of NSAID-induced gastric and duodenal ulcers and their complications. Diclofenac sodium/misoprostol is a combination of diclofenac sodium, a non‑steroidal anti‑inflammatory drug, and misoprostol, a prostaglandin-1 (PGE1) analog, indicated for the treatment of signs and symptoms of osteoarthritis or rheumatoid arthritis in adult patients at high risk of developing NSAID‑induced gastric and duodenal ulcers and their complications.

Diclofenac sodium/misoprostol is a combination product containing diclofenac sodium, an NSAID with analgesic, anti-inflammatory and antipyretic properties, and misoprostol, a GI mucosal protective prostaglandin-1 (PGE1) analog. Diclofenac The mechanism of action of diclofenac, like that of other NSAIDs, is not completely understood but involves inhibition of cyclooxygenase (COX-1 and COX-2). Diclofenac is a potent inhibitor of prostaglandin (PG) synthesis in vitro. Diclofenac concentrations reached during therapy have produced in vivo effects. Prostaglandins sensitize afferent nerves and potentiate the action of bradykinin in inducing pain in animal models. Prostaglandins are mediators of inflammation. Because diclofenac is an inhibitor of prostaglandin synthesis, its mode of action may be due to a decrease of prostaglandins in peripheral tissues.

• Use the lowest effective dosage for the shortest duration consistent with individual patient treatment goals. • Osteoarthritis: The recommended dosage for maximal GI protection is one tablet (containing 50 mg of diclofenac and 200 mcg of misoprostol) three times daily. A dosage of diclofenac higher than 150 mg/day is not recommended. • Rheumatoid Arthritis: The recommended dosage for maximal GI protection is one tablet (containing 50 mg of diclofenac and 200 mcg of misoprostol) three or four times daily A dosage of diclofenac higher than 200 mg/day is not recommended. • For dosage modifications due to intolerance, see the full Prescribing Information.

Diclofenac sodium/misoprostol is contraindicated in the following patients: • Pregnancy. Use of misoprostol, a component of diclofenac sodium/misoprostol, during pregnancy can result in maternal and fetal harm, including uterine rupture, abortion, premature birth, or birth defects • In the setting of coronary artery bypass graft (CABG) surgery • Active gastrointestinal bleeding • History of asthma, urticaria, or other allergic-type reactions after taking aspirin or other NSAIDs.

Boxed warning: Uterine Rupture, Abortion, Premature Birth, and Birth Defects • Administration of misoprostol, a component of diclofenac sodium/misoprostol, to pregnant women can cause uterine rupture, abortion, premature birth, or birth defects. Uterine rupture has occurred when misoprostol was administered in pregnant women to induce labor or an abortion. • Embryo-Fetal Toxicity with NSAIDs: Use of NSAIDs, including diclofenac in women at about 20 weeks gestation and later in pregnancy may cause oligohydramnios/fetal renal dysfunction and premature closure of the fetal ductus arteriosus. • Hepatotoxicity: Inform patients of warning signs and symptoms of hepatotoxicity. Discontinue if abnormal liver tests persist or worsen or if clinical signs and symptoms of liver disease develop.

The following adverse reactions are discussed in greater detail in other sections of the labeling: • Cardiovascular Thrombotic Events • GI Bleeding, Ulceration and Perforation • Hepatotoxicity • Hypertension • Heart Failure and Edema • Renal Toxicity and Hyperkalemia • Anaphylactic Reactions • Serious Skin Reactions • Hematologic Toxicity Most common adverse reactions (>2%) are: abdominal pain, diarrhea, dyspepsia, nausea, flatulence, gastritis, vomiting, constipation, headache, dizziness, alanine aminotransferase increased, hematocrit decreased

See Table 1 for clinically significant drug interactions with diclofenac and misoprostol. Table 1: Clinically Significant Drug Interactions with Diclofenac and Misoprostol Drugs That Interfere with Hemostasis Clinical Impact: • Diclofenac and anticoagulants such as warfarin have a synergistic effect on bleeding. The concomitant use of diclofenac and anticoagulants have an increased risk of serious bleeding compared to the use of either drug alone. • Serotonin release by platelets plays an important role in hemostasis. Case-control and cohort epidemiological studies showed that concomitant use of drugs that interfere with serotonin reuptake and an NSAID may potentiate the risk of bleeding more than an NSAID alone.

Store at 20°C to 25°C (68°F to 77°F). Excursions permitted to 15°C to 30°C (59°F to 86°F).