Flexon

# Flexon ## Overview - **Classification**: Non-Steroidal Anti-Inflammatory Drug (NSAID) - **Mechanism**: Reversibly inhibits cyclooxygenase (COX-1 and COX-2) enzymes, decreasing prostaglandin synthesis, which mediates pain, inflammation, and fever. ## Primary Indications 1. **Mild to Moderate Pain** - Acute and chronic pain relief. 2. **Inflammation** - Reduction of swelling and tenderness in inflammatory conditions. 3. **Fever** - Antipyretic action for febrile conditions. 4. **Dysmenorrhea** - Relief of menstrual cramps. ## Adult Dosing ### Standard Dosing **Mild to Moderate Pain/Fever** - **Dose**: **200 mg** to **400 mg** - **Frequency**: Every 4 to 6 hours as needed - **Route**: Oral (PO) - **Maximum Dose**: **1200 mg** in 24 hours (OTC) / **3200 mg** in 24 hours (Rx, under medical supervision) **Inflammation/Arthritis** - **Dose**: **400 mg** to **800 mg** - **Frequency**: Every 6 to 8 hours - **Route**: Oral (PO) - **Maximum Dose**: **3200 mg** in 24 hours **Dysmenorrhea** - **Dose**: **400 mg** - **Frequency**: Every 4 to 6 hours as needed - **Route**: Oral (PO) - **Maximum Dose**: **1200 mg** in 24 hours ### Dose Adjustments - **Renal Impairment**: Use with caution. Avoid in severe impairment (CrCl < **30 mL/min**). - **Hepatic Impairment**: Use with caution. Avoid in severe hepatic failure. Monitor liver function tests. - **Elderly Patients**: Start at the lower end of the dosing range due to increased risk of adverse effects (GI, renal). ## Pediatric Dosing ### Neonates (0-28 days) - **Dose**: Generally not recommended for routine pain/fever. Specific uses like patent ductus arteriosus (PDA) closure require specialized dosing and monitoring. - **Special Notes**: High risk of renal impairment and GI adverse effects. Consult with a neonatologist. ### Infants (1-12 months) - **Indication**: Pain/Fever - **Dose**: **5 mg/kg** to **10 mg/kg** - **Frequency**: Every 6 to 8 hours as needed - **Maximum**: **40 mg/kg/day** OR **400 mg/dose** (whichever is less) - **Formulation**: Oral suspension is preferred for accurate dosing. ### Children (1-12 years) - **Indication**: Pain/Fever - **Dose**: **5 mg/kg** to **10 mg/kg** - **Frequency**: Every 6 to 8 hours as needed - **Maximum**: **40 mg/kg/day** OR **1200 mg/day** (whichever is less) - **Formulation**: Oral suspension or chewable tablets may be suitable. ### Adolescents (13-18 years) - **Indication**: Pain/Fever/Inflammation - **Dose**: Follow adult dosing, starting at the lower end. - **Maximum**: Adult maximum dose applies (**1200 mg/day** OTC, **3200 mg/day** Rx). ## Safety Information ### Contraindications - **Absolute**: Hypersensitivity to Flexon or other NSAIDs/aspirin. - **Absolute**: History of aspirin-induced asthma, urticaria, or allergic-type reactions. - **Absolute**: Active gastrointestinal bleeding or peptic ulcer disease. - **Absolute**: Severe renal or hepatic impairment. - **Absolute**: Severe heart failure. - **Absolute**: Third trimester of pregnancy (risk of premature ductus arteriosus closure). - **Absolute**: Post-coronary artery bypass graft (CABG) surgery. ### Common Adverse Effects - **Very Common (>10%)**: Dyspepsia, nausea, abdominal pain. - **Common (1-10%)**: Headache, dizziness, diarrhea, constipation, rash, fluid retention. - **Serious but Rare**: Gastrointestinal bleeding/perforation, renal failure, cardiovascular thrombotic events (MI, stroke), anaphylaxis, Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN). ### Key Drug Interactions - **Anticoagulants (Warfarin, NOACs)**: Increased risk of bleeding. Monitor INR/clinical signs. - **Antiplatelet Agents (Aspirin, Clopidogrel)**: Increased GI bleeding risk. Avoid concomitant use if possible. - **Lithium**: May increase serum lithium levels, leading to toxicity. Monitor lithium levels. - **Methotrexate**: May increase methotrexate toxicity. Use with caution. - **Diuretics/ACE Inhibitors/ARBs**: May reduce antihypertensive/diuretic effects and increase risk of renal impairment. Monitor blood pressure and renal function. ## Monitoring & Follow-up - **Before Treatment**: Assess baseline renal function (SCr, CrCl) and liver function (ALT, AST) for prolonged use or high-risk patients. - **During Treatment**: - **Renal Function**: Periodically, especially with chronic use, in elderly, or in patients with comorbidities. - **CBC**: Annually for chronic use, monitor for signs of GI bleeding (anemia). - **Clinical Signs**: Monitor for signs of GI bleeding (melena, hematemesis), edema, rash, or changes in urine output. ## Clinical Pearls - 💡 **Tip 1**: Advise patients to take Flexon with food or milk to minimize gastrointestinal upset. - 💡 **Tip 2**: Ensure adequate hydration, especially in hot weather or during illness, to protect kidney function. - 💡 **Tip 3**: Counsel patients to report any signs of unusual bleeding, severe stomach pain, or persistent nausea immediately. > **⚠️ Important**: This information is for educational purposes only. Always consult current prescribing information, local guidelines, and clinical judgment before prescribing.