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# Meftal spas
## Overview
Meftal spas is a combination product containing mefenamic acid, a nonsteroidal anti-inflammatory drug (NSAID), and hyoscine butylbromide, an anticholinergic antispasmodic.
## Primary Indications
* Symptomatic relief of abdominal pain and cramps associated with gastrointestinal disorders.
* Painful menstruation (dysmenorrhea).
## Adult Dosing
* **Mefenamic acid:** 500 mg every 8 hours as needed. Maximum daily dose: 1500 mg.
* **Hyoscine butylbromide:** 10 mg every 8 hours as needed. Maximum daily dose: 30 mg.
* **Meftal spas (combination tablet):** Typically contains 250 mg mefenamic acid and 10 mg hyoscine butylbromide per tablet. Usual dose is 1-2 tablets every 8 hours as needed. Consult specific product labeling for exact formulation and dosage. Duration of treatment should be limited.
## Pediatric Dosing
Mefenamic acid is generally not recommended for children under 14 years of age without medical supervision. Hyoscine butylbromide dosing for pediatric patients is not well-established with this combination product. Use in pediatrics is generally not recommended.
## Dose Adjustments
* **Renal Impairment:** Use with caution. Mefenamic acid can cause renal damage.
* **Hepatic Impairment:** Use with caution. Monitor liver function.
* **Elderly:** Increased risk of adverse effects from mefenamic acid, including gastrointestinal bleeding and renal problems. Use the lowest effective dose.
## Contraindications
* Hypersensitivity to mefenamic acid, hyoscine butylbromide, or any component of the formulation.
* Active gastrointestinal bleeding or perforation.
* History of gastrointestinal bleeding or perforation related to NSAID use.
* Severe hepatic or renal impairment.
* Myasthenia gravis.
* Glaucoma (narrow-angle).
* Prostatic hypertrophy with urinary retention.
* Tachyarrhythmias.
* Ileus.
* Megacolon.
* Lactation.
## Adverse Effects
* **Common (Mefenamic Acid):** Diarrhea, nausea, vomiting, abdominal pain, dyspepsia, constipation, rash.
* **Common (Hyoscine Butylbromide):** Dry mouth, blurred vision, constipation, urinary retention, tachycardia, drowsiness.
* **Serious:** Gastrointestinal bleeding, ulceration, perforation; renal papillary necrosis; hepatic dysfunction; cardiovascular thrombotic events; severe skin reactions (e.g., Stevens-Johnson syndrome, toxic epidermal necrolysis); anaphylaxis.
## Key Drug Interactions
* **Mefenamic Acid:**
* Other NSAIDs, aspirin, corticosteroids, SSRIs, anticoagulants (warfarin, heparin), antiplatelets (clopidogrel): Increased risk of GI bleeding.
* ACE inhibitors, ARBs, diuretics: Reduced antihypertensive effect and increased risk of renal dysfunction.
* Lithium, Methotrexate: Increased serum levels and toxicity.
* **Hyoscine Butylbromide:**
* Other anticholinergics, antihistamines, tricyclic antidepressants, amantadine, MAO inhibitors: Potentiated anticholinergic effects.
## Monitoring
* Monitor for signs and symptoms of gastrointestinal bleeding (e.g., melena, hematemesis).
* Monitor for signs of renal and hepatic dysfunction.
* Monitor blood pressure.
* Assess for signs of anticholinergic adverse effects.
## Clinical Pearls
* Meftal spas should be used for the shortest duration necessary to control symptoms due to the risk of GI and cardiovascular adverse events associated with mefenamic acid.
* Consider risk factors for GI bleeding when prescribing, especially in the elderly or those with a history of ulcers.
* Adequate hydration is important, particularly if experiencing diarrhea or vomiting.
* Caution patients about potential drowsiness and impaired ability to drive or operate machinery.
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**Disclaimer:** This information is intended for healthcare professionals and does not replace comprehensive prescribing information. Always consult the most current drug information available from the manufacturer or other authoritative sources before making any clinical decisions. Local formularies and prescribing guidelines may also influence drug use.
