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# Calamine Lotion ## Overview Calamine lotion is a topical protectant and antipruritic agent. It is a mixture of zinc oxide (white) and ferric oxide (pink/red), suspended in a base that includes glycerin and aqueous vehicles. Upon application, the evaporation of the vehicle provides a cooling sensation, while the zinc oxide acts as a mild astringent. ## 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 abrasions. * Drying agent for weeping or oozing skin conditions (e.g., chickenpox, contact dermatitis). ## Adult Dosing * **Application:** Apply a thin layer to the affected area. * **Frequency:** 3 to 4 times daily, or as needed for pruritus. * **Maximum:** No formal maximum, but excessive use may lead to over-drying or skin irritation. ## Pediatric Dosing * **Infants and Children:** Safe for use in the same manner as adults. * **Note:** Use sparingly on infants to avoid potential irritation or excessive drying of delicate skin. Do not apply to areas where the infant may ingest the product (e.g., hands, near mouth). ## Dose Adjustments * **Renal/Hepatic Impairment:** No adjustments required as systemic absorption is negligible. * **Geriatric:** No specific adjustments, though note that skin may be more fragile; discontinue if excessive dryness occurs. ## Contraindications * Hypersensitivity to any component (zinc oxide, ferric oxide, or excipients). * Should not be applied to blistered, raw, or oozing skin that shows signs of secondary bacterial infection (pus, crusting, surrounding cellulitis). ## Adverse Effects * **Local:** Irritation, burning, stinging, or erythema. * **Overuse:** Excessive drying of the skin, leading to cracking or dermatitis. ## Key Drug Interactions * Minimal to no known clinical drug interactions due to low systemic absorption. * May physically obstruct the absorption of other concurrently applied topical medications; apply other topicals before calamine or allow intervals between applications. ## Monitoring * Monitor for signs of secondary infection (increased redness, swelling, warmth, purulent drainage, fever). * Assess for resolution of symptoms within 7 days. If symptoms persist or worsen, medical evaluation is required. ## Clinical Pearls * **Shake well:** The active ingredients settle; ensure the bottle is shaken vigorously before every application to ensure proper concentration. * **Wash off:** Allow the lotion to dry, but gently wash off previous applications with warm water before re-applying to prevent buildup. * **Not for ingestion:** Calamine is strictly for external use. Keep out of reach of children to prevent accidental ingestion. * **Counseling:** Advise patients that it will leave a visible pink, powdery residue. *** **Disclaimer:** This information is for educational purposes and does not replace professional clinical judgment. Always verify current prescribing information, institutional protocols, and product labeling before use. Seek medical professional guidance for persistent or severe dermatological conditions.