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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 agent.
## Primary Indications
* Symptomatic relief of pain and spasms associated with:
* Gastrointestinal disorders (e.g., irritable bowel syndrome, diverticulitis)
* Biliary colic
* Renal colic
* Dysmenorrhea
## Adult Dosing
* **Mefenamic acid component:** Typically 250 mg to 500 mg orally every 8 hours as needed. Maximum daily dose of mefenamic acid is generally 1500 mg for short-term use.
* **Hyoscine butylbromide component:** Typically 10 mg orally every 8 hours as needed.
*Note: Specific dosing and duration of therapy may depend on the severity of symptoms and local protocols.*
## Pediatric Dosing
* Mefenamic acid: Dosing is typically weight-based, **20-25 mg/kg/day divided into 3-4 doses**. Do not exceed the adult maximum dose.
* Hyoscine butylbromide: Generally **not recommended for use in pediatric patients** due to lack of established safety and efficacy data.
## Dose Adjustments
* **Renal Impairment:** Mefenamic acid should be used with caution in patients with moderate to severe renal impairment. Dose reduction may be considered, or alternative agents preferred.
* **Hepatic Impairment:** Mefenamic acid should be used with caution in patients with hepatic impairment.
## Contraindications
* Hypersensitivity to mefenamic acid, hyoscine butylbromide, or any component of the formulation.
* Active gastrointestinal bleeding or perforation.
* Inflammatory bowel disease (e.g., Crohn's disease, ulcerative colitis).
* Severe hepatic or renal impairment.
* Myasthenia gravis.
* Tachycardia, glaucoma (angle-closure), obstructive uropathy or ileus (contraindications for hyoscine butylbromide).
* Late pregnancy (third trimester).
## Adverse Effects
* **Mefenamic acid:** Gastrointestinal disturbances (dyspepsia, nausea, vomiting, diarrhea, abdominal pain, constipation), dizziness, headache, rash, increased risk of cardiovascular thrombotic events, renal toxicity, hepatic toxicity, bronchospasm.
* **Hyoscine butylbromide:** Dry mouth, blurred vision, constipation, urinary retention, tachycardia, dizziness, drowsiness.
## Key Drug Interactions
* **Mefenamic acid:**
* Anticoagulants (e.g., warfarin): Increased risk of bleeding.
* Corticosteroids: Increased risk of GI ulceration and bleeding.
* SSRIs/SNRIs: Increased risk of GI bleeding.
* Diuretics, ACE inhibitors, ARBs: Decreased antihypertensive effect and increased risk of renal impairment.
* Lithium: Increased lithium levels.
* Methotrexate: Increased methotrexate toxicity.
* **Hyoscine butylbromide:**
* Other anticholinergic agents (e.g., tricyclic antidepressants, antihistamines, amantadine): Potentiated anticholinergic effects.
* Dopamine antagonists (e.g., metoclopramide): May reduce the effects of both drugs.
## Monitoring
* Monitor for signs and symptoms of gastrointestinal bleeding or perforation.
* Assess renal and hepatic function periodically, especially with prolonged use or in patients with risk factors.
* Monitor for signs of cardiovascular thrombotic events.
* Assess for anticholinergic side effects.
## Clinical Pearls
* Mefenamic acid is typically used for short-term symptomatic relief.
* Concomitant use of gastroprotective agents (e.g., PPIs) may be considered in patients at risk for GI complications.
* Due to the anticholinergic effects of hyoscine butylbromide, caution is advised in the elderly and in patients with certain medical conditions (e.g., prostatic hyperplasia, cardiac arrhythmias).
* This combination is not a first-line therapy for severe pain and should be used judiciously.
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**Disclaimer:** This information is intended for healthcare professionals and does not replace comprehensive drug information resources. Always consult the most current prescribing information and relevant clinical guidelines before making therapeutic decisions.
