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# Meftal Spas
## Overview
Meftal Spas is a combination product containing mefenamic acid, a nonsteroidal anti-inflammatory drug (NSAID), and dicyclomine, an anticholinergic antispasmodic. Mefenamic acid works by inhibiting cyclooxygenase (COX) enzymes, thereby reducing prostaglandin synthesis. Dicyclomine reduces gastrointestinal smooth muscle spasm by blocking muscarinic receptors.
## Primary Indications
* Treatment of dysmenorrhea.
* Relief of abdominal pain associated with antispasmodic indications.
## Adult Dosing
* **Dysmenorrhea:** 250 mg mefenamic acid and 10 mg dicyclomine every 8 hours, or 500 mg mefenamic acid and 20 mg dicyclomine every 8 hours, as needed for pain.
* **Abdominal Pain:** Dosing varies based on indication and physician preference, but typically involves 250 mg mefenamic acid and 10 mg dicyclomine taken every 8 hours as needed.
## Pediatric Dosing
* Specific pediatric dosing for Meftal Spas is not well-established and use should be cautious. Mefenamic acid pediatric dosing is generally based on weight (e.g., 5-7 mg/kg/dose every 6-8 hours). Dicyclomine pediatric dosing is also weight-based (e.g., 0.1 mg/kg/dose every 4-6 hours). Combination product dosing in pediatrics is not standard.
## Dose Adjustments
* **Renal Impairment:** Use with caution. Mefenamic acid is renally excreted and can worsen renal function. Dose reduction may be necessary in mild to moderate impairment. Avoid in severe renal impairment.
* **Hepatic Impairment:** Use with caution. Mefenamic acid is metabolized in the liver. Monitor liver function closely. Avoid in severe hepatic impairment.
* **Elderly:** Increased risk of adverse effects, particularly gastrointestinal bleeding, renal dysfunction, and cardiovascular events. Use with caution and at the lowest effective dose.
## Contraindications
* Hypersensitivity to mefenamic acid, dicyclomine, or other NSAIDs or anticholinergics.
* History of asthma, urticaria, or allergic-type reactions after aspirin or other NSAIDs.
* Inflammatory bowel disease.
* Gastrointestinal obstruction or atony.
* Uncontrolled glaucoma.
* Myasthenia gravis.
* Severe renal or hepatic impairment.
* Severe ulcerative colitis.
* Prostatic hypertrophy with urinary retention.
* Cardioselective beta-blocker therapy (due to dicyclomine's anticholinergic effects).
## Adverse Effects
* **Mefenamic Acid:** Gastrointestinal (dyspepsia, nausea, vomiting, diarrhea, abdominal pain, bleeding, ulceration, perforation), renal (acute kidney injury, interstitial nephritis), hepatic (elevated transaminases), hypersensitivity reactions (rash, bronchospasm, Stevens-Johnson syndrome, toxic epidermal necrolysis), cardiovascular (increased risk of MI, stroke).
* **Dicyclomine:** Anticholinergic effects (dry mouth, blurred vision, urinary retention, constipation, drowsiness, confusion, tachycardia), dizziness, headache.
## Key Drug Interactions
* **Other NSAIDs and Aspirin:** Increased risk of GI bleeding.
* **Anticoagulants (e.g., Warfarin) and Antiplatelets (e.g., Clopidogrel):** Increased risk of bleeding.
* **Corticosteroids:** Increased risk of GI ulceration and bleeding.
* **SSRIs and SNRIs:** Increased risk of GI bleeding.
* **ACE Inhibitors, ARBs, Diuretics:** NSAIDs can attenuate their antihypertensive effects and increase risk of renal impairment.
* **Lithium:** NSAIDs can increase lithium levels.
* **Methotrexate:** NSAIDs can increase methotrexate toxicity.
* **Anticholinergics (other):** Additive anticholinergic effects.
* **Amantadine, Quindine, Tricyclic Antidepressants:** Increased risk of anticholinergic adverse effects.
## Monitoring
* **Renal function:** Baseline and periodic monitoring of serum creatinine and BUN, especially in patients with risk factors for renal impairment.
* **Liver function:** Baseline and periodic monitoring of LFTs, especially in patients with pre-existing liver disease.
* **Gastrointestinal symptoms:** Monitor for signs and symptoms of GI bleeding or ulceration.
* **Blood pressure:** NSAIDs can increase blood pressure.
* **Signs of anticholinergic toxicity:** Monitor for dry mouth, blurred vision, urinary retention, and cognitive changes.
## Clinical Pearls
* Meftal Spas should be used for the shortest duration necessary to control symptoms.
* Administer with food or milk to minimize gastrointestinal upset.
* Caution in patients with dehydration, heat prostration, or significant blood loss, as dicyclomine can worsen these conditions by reducing sweating.
* The combination may mask symptoms of appendicitis or other surgical conditions.
* Ensure adequate hydration, especially in elderly patients or those on diuretics.
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**Disclaimer:** This information is intended for healthcare professionals. It is essential to consult the most current prescribing information and relevant clinical guidelines for definitive patient management. This information does not substitute for professional medical judgment.
