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# Meftal Spas
## Overview
Meftal Spas is a brand name for a combination medication containing mefenamic acid (a nonsteroidal anti-inflammatory drug - NSAID) and hyoscine butylbromide (an anticholinergic antispasmodic). Mefenamic acid reduces inflammation and pain, while hyoscine butylbromide relaxes smooth muscles in the gastrointestinal tract.
## Primary Indications
* Abdominal pain associated with spasms
* Menstrual cramps (dysmenorrhea)
## Adult Dosing
* **Mefenamic Acid:** Typically 250 mg to 500 mg every 8 hours. Maximum daily dose is 1500 mg.
* **Hyoscine Butylbromide:** Typically 10 mg to 20 mg every 8 hours.
* **Meftal Spas (Combination Product):** Consult product labeling for specific formulation (e.g., tablet strength). Dosing usually follows the individual component recommendations. For instance, a common dose might be one tablet every 8 hours as needed for pain.
## Pediatric Dosing
* **Mefenamic Acid:** Generally not recommended for children under 12 years of age due to potential for serious adverse effects. If used, pediatric dosing is typically weight-based: 5 to 7 mg/kg/dose every 6 to 8 hours, not to exceed 500 mg per dose or 2000 mg/day.
* **Hyoscine Butylbromide:** Limited data in pediatric populations. Generally not recommended for routine use. If used, doses are typically lower and guided by weight and physician judgment.
* **Meftal Spas (Combination Product):** **Not recommended for use in pediatric patients.**
## Dose Adjustments
* **Renal Impairment:** Use with caution. Mefenamic acid is renally excreted and can cause renal toxicity. Dosage reduction may be necessary based on renal function.
* **Hepatic Impairment:** Use with caution. Mefenamic acid is metabolized by the liver.
* **Elderly:** Increased risk of adverse effects, particularly GI bleeding, renal toxicity, and cardiovascular events. Consider lower doses and shorter duration of therapy.
## Contraindications
* Hypersensitivity to mefenamic acid, hyoscine butylbromide, or other NSAIDs/anticholinergics.
* History of asthma, urticaria, or allergic-type reactions after taking aspirin or other NSAIDs.
* Severe renal or hepatic impairment.
* Gastrointestinal bleeding or perforation.
* Obstructive uropathy or gastrointestinal obstruction.
* Myasthenia gravis.
* Tachycardia.
* Angle-closure glaucoma.
* Prostatic hypertrophy with urinary retention.
* Pregnancy (especially third trimester) and breastfeeding.
## Adverse Effects
* **Common (Mefenamic Acid):** Diarrhea, nausea, vomiting, abdominal pain, headache, dizziness.
* **Serious (Mefenamic Acid):** Gastrointestinal bleeding, ulceration, perforation; renal failure; hepatotoxicity; cardiovascular thrombotic events; Stevens-Johnson syndrome/toxic epidermal necrolysis; exacerbation of asthma.
* **Common (Hyoscine Butylbromide):** Dry mouth, blurred vision, constipation, urinary retention, tachycardia, sweating decreased.
* **Serious (Hyoscine Butylbromide):** Angle-closure glaucoma, severe allergic reactions.
## Key Drug Interactions
* **NSAIDs (e.g., aspirin, ibuprofen):** Increased risk of GI toxicity.
* **Anticoagulants (e.g., warfarin):** Increased risk of bleeding.
* **Diuretics and antihypertensives:** May reduce efficacy and increase risk of renal toxicity.
* **Corticosteroids:** Increased risk of GI adverse effects.
* **SSRIs/SNRIs:** Increased risk of GI bleeding.
* **Other anticholinergics:** Additive anticholinergic effects.
* **Opioids:** May mask symptoms of GI obstruction or toxicity.
* **Metoclopramide:** May antagonize hyoscine butylbromide's effects.
## Monitoring
* **Renal function:** Monitor creatinine and BUN, especially in patients with pre-existing renal disease or those on long-term therapy.
* **Hepatic function:** Monitor LFTs if signs of hepatic dysfunction appear.
* **Gastrointestinal symptoms:** Assess for signs of bleeding (e.g., melena, hematemesis) or ulceration.
* **Blood pressure:** Especially in patients with hypertension.
* **Fluid balance:** Monitor for signs of fluid retention.
## Clinical Pearls
* Use the lowest effective dose for the shortest possible duration to minimize risks.
* Administer with food or milk to reduce GI upset.
* Mefenamic acid should not be used for more than 7 days consecutively due to potential for serious adverse effects.
* Be aware of the anticholinergic side effects of hyoscine butylbromide, especially in the elderly.
* Discontinue immediately if signs of GI bleeding, renal impairment, or severe allergic reaction occur.
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*This information is intended for healthcare professionals and does not replace the need to consult the most current prescribing information, local guidelines, or drug compendia. Always verify drug information before use.*
