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# Meftal spas
## Overview
Meftal spas is a combination product containing mefenamic acid and dicyclomine hydrochloride. Mefenamic acid is a nonsteroidal anti-inflammatory drug (NSAID) used for pain relief. Dicyclomine is an anticholinergic and antispasmodic agent used to relieve smooth muscle spasms.
## Primary Indications
* Symptomatic relief of mild to moderate pain associated with smooth muscle spasms, such as in dysmenorrhea or gastrointestinal colic.
## Adult Dosing
* **Typical Dose:** 1 tablet (mefenamic acid 250 mg, dicyclomine 20 mg) every 8 hours.
* **Maximum Dose:** Consult local prescribing information; typically, mefenamic acid is not recommended for use beyond 7 days.
## Pediatric Dosing
* Safety and efficacy in pediatric patients have not been established. Meftal spas is generally not recommended for use in children.
## Dose Adjustments
* **Renal Impairment:** Use with caution. Mefenamic acid is renally excreted. Dosage reduction may be necessary in severe impairment.
* **Hepatic Impairment:** Use with caution. Mefenamic acid is metabolized by the liver.
## Contraindications
* Hypersensitivity to mefenamic acid, dicyclomine, or other NSAIDs.
* Active gastrointestinal bleeding or a history of gastrointestinal bleeding/perforation related to NSAID use.
* Severe renal or hepatic impairment.
* Myasthenia gravis.
* Glaucoma.
* Obstructive uropathy or gastrointestinal obstruction.
* Unstable heart failure.
* Pregnancy (especially third trimester).
* Children.
## Adverse Effects
* **Common (Mefenamic Acid):** Gastrointestinal upset (nausea, vomiting, diarrhea, constipation), abdominal pain, dyspepsia, headache, dizziness, rash.
* **Common (Dicyclomine):** Dry mouth, blurred vision, constipation, urinary retention, drowsiness, dizziness.
* **Serious:** Gastrointestinal bleeding/perforation, renal failure, hepatic impairment, cardiovascular events (NSAID-related), severe allergic reactions.
## Key Drug Interactions
* **Anticoagulants (e.g., warfarin):** Increased risk of bleeding.
* **Corticosteroids:** Increased risk of gastrointestinal ulceration and bleeding.
* **Other NSAIDs:** Increased risk of gastrointestinal and renal adverse effects.
* **ACE inhibitors, ARBs, Diuretics:** Reduced antihypertensive effect, increased risk of renal impairment.
* **Lithium:** Increased lithium levels.
* **Methotrexate:** Increased methotrexate toxicity.
* **Anticholinergics (e.g., atropine, tricyclic antidepressants):** Additive anticholinergic effects.
* **MAO inhibitors:** May exacerbate anticholinergic effects.
## Monitoring
* **Renal function:** Baseline and periodically, especially in patients with pre-existing renal disease or those on concomitant nephrotoxic agents.
* **Liver function:** Baseline and periodically, especially in patients with hepatic impairment.
* **Signs of gastrointestinal bleeding:** Monitor for blood in stool, melena, hematemesis.
* **Blood pressure:** Especially when used long-term.
## Clinical Pearls
* Due to the risk of gastrointestinal bleeding and ulceration, mefenamic acid should be used at the lowest effective dose for the shortest duration necessary.
* Dicyclomine can cause anticholinergic side effects, particularly in the elderly. Patients should be advised about blurred vision, dry mouth, and potential for urinary retention.
* Avoid concurrent use of other NSAIDs.
* Consider gastric protection (e.g., PPI) for patients at high risk of GI complications.
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**Disclaimer:** This information is intended for healthcare professionals. Always consult the most current prescribing information and local protocols for definitive guidance.
