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# Zinc (Dispersible Tablets) ## Overview Zinc is an essential trace element involved in numerous enzymatic processes, protein synthesis, and immune function. Dispersible tablets (DT) are designed to be dissolved in a small amount of liquid, facilitating administration in pediatric and geriatric populations. Elemental zinc content varies by salt form (e.g., zinc sulfate, zinc gluconate, zinc acetate); ensure the dose refers to **elemental zinc**. ## Primary Indications * Treatment of acute diarrhea (adjunct to Oral Rehydration Salts). * Zinc deficiency (malabsorption, prolonged parenteral nutrition, or chronic diarrhea). * Wilson’s disease (as zinc acetate). ## Adult Dosing * **Acute Diarrhea:** 20 mg elemental zinc daily for 10–14 days. * **Zinc Deficiency:** 25–50 mg elemental zinc daily. * **Wilson’s Disease:** 50 mg elemental zinc 3 times daily (maintenance). * **Maximum:** Tolerable Upper Intake Level (UL) is 40 mg/day for chronic use; higher doses for specific medical conditions should be under specialist supervision. ## Pediatric Dosing * **Acute Diarrhea (WHO/UNICEF guidelines):** * **< 6 months:** 10 mg elemental zinc daily for 10–14 days. * **≥ 6 months:** 20 mg elemental zinc daily for 10–14 days. * **Maintenance/Deficiency:** Varies by local protocol; typically 0.5–1 mg/kg/day. ## Dose Adjustments * **Renal Impairment:** No specific adjustment, but monitor for accumulation if severe. * **Hepatic Impairment:** Generally not required, though use caution in cases of chronic liver disease where copper metabolism may be altered. ## Contraindications * Hypersensitivity to any component of the formulation. * Acute toxicity or conditions where excessive zinc intake is contraindicated. ## Adverse Effects * **Common:** GI distress (nausea, vomiting, diarrhea, metallic taste, abdominal pain). * **Long-term/High-dose:** Copper deficiency (manifesting as anemia or neutropenia), sideroblastic anemia, and immune system impairment. ## Key Drug Interactions * **Fluoroquinolones/Tetracyclines:** Zinc reduces absorption; administer antibiotics at least 2 hours before or 4–6 hours after zinc. * **Penicillamine/Trientine:** Zinc decreases absorption of these agents (critical in Wilson's disease management). * **Calcium/Iron Supplements:** May compete for intestinal absorption. ## Monitoring * **Long-term Therapy:** Monitor serum copper and ceruloplasmin levels to prevent induced copper deficiency. * **Hematologic:** Periodic CBC to monitor for anemia or neutropenia associated with copper depletion. ## Clinical Pearls * **Administration:** Disperse the tablet in a teaspoon of water or breast milk immediately before administration. * **Taste:** Zinc can be bitter and cause nausea; administering with a small amount of food (if not interfering with absorption) or liquid can improve tolerability. * **Bioavailability:** Zinc sulfate is the most commonly used salt for diarrhea treatment due to cost and efficacy profile. * **Efficacy:** Zinc supplementation for diarrhea reduces the duration and severity of the episode and protects against future episodes for several months. *** *Disclaimer: This information is for educational purposes only. Clinical protocols for zinc supplementation vary by region and clinical context. Always verify dosages and specific salt formulations against current institutional guidelines, local formularies, and official product labeling before prescribing or administering.*