Meftal%2525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252520spas

# Meftal spas ## Overview Meftal spas is a combination product containing mefenamic acid, a non-steroidal anti-inflammatory drug (NSAID), and hyoscine-N-butylbromide (also known as scopolamine butylbromide), an antispasmodic. Mefenamic acid works by inhibiting cyclooxygenase (COX) enzymes, reducing prostaglandin synthesis. Hyoscine-N-butylbromide blocks muscarinic receptors in the parasympathetic nervous system, leading to smooth muscle relaxation. ## Primary Indications * Relief of abdominal pain and cramps associated with smooth muscle spasms, particularly in conditions like irritable bowel syndrome (IBS), diverticulitis, and gastrointestinal spasms. * Management of dysmenorrhea. ## Adult Dosing * **General:** One tablet (containing 250 mg mefenamic acid and 10 mg hyoscine-N-butylbromide) taken 3 times daily. * **Maximum Dose:** Not explicitly defined for the combination product, but individual component maximums should be considered. Mefenamic acid typically: 500 mg every 6-8 hours, not to exceed 1500 mg/day for short-term use. Hyoscine-N-butylbromide: typically 10-20 mg up to 4 times daily. ## Pediatric Dosing There is **no established pediatric dosing** for Meftal spas. Mefenamic acid is generally not recommended for children under 14 years of age due to potential toxicity. ## Dose Adjustments * **Renal Impairment:** Use with caution. Mefenamic acid is renally excreted and can cause renal toxicity. Dose reduction may be necessary based on renal function, but specific guidelines for this combination are not available. * **Hepatic Impairment:** Use with caution. Mefenamic acid is metabolized in the liver. Dose adjustment may be considered. * **Elderly:** Increased risk of adverse effects with NSAIDs. Use with caution and at the lowest effective dose. ## Contraindications * Hypersensitivity to mefenamic acid, hyoscine-N-butylbromide, or any component of the formulation. * History of bronchospasm, asthma, or allergic rhinitis associated with NSAID use. * Active peptic ulceration or history of recurrent peptic ulceration. * Severe renal, hepatic, or cardiac impairment. * Myasthenia gravis. * Tachyarrhythmias. * Megaloblastic anemia. * Glaucoma (especially narrow-angle glaucoma, due to the anticholinergic effects of hyoscine). * Prostatic hypertrophy with urinary retention. * Intestinal obstruction or paralytic ileus. * Adolescents and children (due to mefenamic acid). ## Adverse Effects * **Common (Mefenamic Acid):** Gastrointestinal upset (nausea, vomiting, diarrhea, constipation, abdominal pain), dizziness, headache, drowsiness. * **Common (Hyoscine-N-butylbromide):** Dry mouth, blurred vision, constipation, urinary retention, drowsiness, tachycardia. * **Serious (Mefenamic Acid):** Gastrointestinal bleeding, ulceration, perforation; renal toxicity (interstitial nephritis, papillary necrosis); hepatic impairment; hypersensitivity reactions (including Stevens-Johnson syndrome, toxic epidermal necrolysis); cardiovascular thrombotic events; anemia. * **Serious (Hyoscine-N-butylbromide):** Exacerbation of glaucoma, urinary retention, tachycardia. ## Key Drug Interactions * **Mefenamic Acid:** * **Anticoagulants (e.g., warfarin):** Increased risk of bleeding. * **Corticosteroids:** Increased risk of gastrointestinal ulceration and bleeding. * **Other NSAIDs/Aspirin:** Increased risk of gastrointestinal toxicity and bleeding. * **ACE inhibitors/ARBs/Diuretics:** Reduced antihypertensive effect and increased risk of renal impairment. * **Lithium:** Increased lithium levels. * **Methotrexate:** Increased methotrexate toxicity. * **Hyoscine-N-butylbromide:** * **Anticholinergics (e.g., tricyclic antidepressants, antihistamines):** Potentiated anticholinergic effects. * **Dopamine antagonists (e.g., metoclopramide):** May reduce the efficacy of both drugs. * **Amantadine:** Increased risk of anticholinergic side effects. ## Monitoring * **GI Bleeding:** Monitor for signs and symptoms of bleeding (e.g., melena, hematemesis). * **Renal Function:** Baseline and periodic monitoring of serum creatinine and BUN, especially in patients with pre-existing renal disease or those at risk. * **Hepatic Function:** Baseline and periodic monitoring of liver enzymes. * **Blood Pressure:** Monitor blood pressure, especially during long-term NSAID use. * **Signs of Anticholinergic Effects:** Monitor for dry mouth, blurred vision, urinary retention, and constipation. ## Clinical Pearls * Meftal spas should be used for the shortest duration necessary to control symptoms. * It is best taken with food or milk to minimize gastrointestinal upset. * Due to the anticholinergic effects, caution is advised in elderly patients and those with conditions like glaucoma, prostatic hypertrophy, or intestinal motility issues. * The combination may be particularly useful for painful cramping associated with diarrhea, where both spasmolytic and anti-inflammatory effects are desired. * The potential for serious gastrointestinal and renal adverse effects with mefenamic acid necessitates careful patient selection and monitoring. *** **Disclaimer:** This information is intended for healthcare professionals and is not a substitute for professional medical advice. Always consult the most current prescribing information and relevant guidelines before making any treatment decisions. Drug information can change rapidly.