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# Calamine Lotion ## Overview Calamine lotion is a topical skin protectant containing zinc oxide and ferric oxide. It serves as an astringent and mild antipruritic, typically formulated as a suspension that leaves a cooling, protective film upon solvent evaporation. ## Primary Indications * Relief of minor skin irritations (e.g., poison ivy, poison oak, poison sumac). * Relief of pruritus associated with insect bites, stings, or minor rashes. ## Adult Dosing * **Topical:** Apply a thin layer to the affected area as needed, up to 3–4 times daily. * **Maximum:** No specific daily maximum established, but discontinue if the condition worsens or persists beyond 7 days. ## Pediatric Dosing * **Children ≥ 6 months:** Apply a thin layer to the affected area as needed, up to 3–4 times daily. * **Infants < 6 months:** Consult a pediatrician before use. Safety and efficacy not well-established in this population. ## Dose Adjustments * No systemic dose adjustments required due to minimal percutaneous absorption. ## Contraindications * Hypersensitivity to any component of the formulation. * Do not apply to open wounds, blistered, or raw, oozing skin (may cause crusting/trapping of bacteria). * Avoid contact with eyes, mouth, or mucous membranes. ## Adverse Effects * **Common:** Mild stinging or burning upon application, localized cutaneous dryness. * **Rare:** Allergic contact dermatitis, skin irritation. ## Key Drug Interactions * None clinically significant due to limited systemic absorption. ## Monitoring * Monitor for signs of secondary bacterial infection (e.g., increased erythema, warmth, purulence). * Assess for allergic reactions or worsening of the pruritic condition. ## Clinical Pearls * **Shake Well:** Always shake the bottle vigorously before use to ensure proper suspension of the active ingredients. * **Application:** Allow the lotion to dry completely on the skin. It acts by creating a barrier and providing a cooling sensation via evaporation. * **Staining:** Note that the lotion may stain clothing or linens. * **Combination Products:** If the product contains additional ingredients (e.g., pramoxine or diphenhydramine), assess for potential systemic toxicity if applied over extensive body surface areas, particularly in younger children. *** *Disclaimer: This information is for educational purposes only. Always verify drug labeling, prescribing information, and institutional protocols with current clinical databases (e.g., Lexicomp, UpToDate) before administration.*