{ "schema_version": 1, "kind": "condition", "id": "photoallergic-reaction", "name": "Photoallergic reaction to sunlight", "category": "acute", "sources": "DailyMed SetID 8274ca80-e7d3-4f4f-9901-cc5c589b4fef sections 1 and 2.2, https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=8274ca80-e7d3-4f4f-9901-cc5c589b4fef · Levocetirizine dihydrochloride tablets US prescribing information, sections 1 and 2 Dosage and Administration (DailyMed SetID 8274ca80-e7d3-4f4f-9901-cc5c589b4fef) · Sathe NC, Gillespie E. Photosensitivity and Photodermatoses. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2026 Jan-. Updated 2026 Jan 31. Bookshelf ID: NBK431072; PMID: 28613726.", "review_status": "reviewed", "verified_against": "DailyMed SetID 8274ca80-e7d3-4f4f-9901-cc5c589b4fef sections 1 and 2.2, https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=8274ca80-e7d3-4f4f-9901-cc5c589b4fef", "verified_date": "2026-08", "treatments": [ { "id": 1408, "generic": "Levocetirizine", "line": 1, "is_adjunct": false, "form": "oral.solid", "strength_mg": 5.0, "adult_dose": "5 mg PO once daily in evening (2.5 mg once daily may suffice).", "adult_duration": "While symptoms persist; review at 4-6 weeks", "dose_source": "DailyMed SetID 8274ca80-e7d3-4f4f-9901-cc5c589b4fef sections 1 and 2.2, https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=8274ca80-e7d3-4f4f-9901-cc5c589b4fef", "rationale": "Standard second-generation antihistamine dose for the itch of an allergic/photoallergic skin reaction; dosing does not change with the trigger for the itch.", "cautions": [ "Widespread blistering or systemic symptoms suggesting a severe photosensitivity reaction, or an underlying photosensitising drug that must be stopped.", "Evening dosing suits itch that is often worse at night.", "Do not combine with cetirizine - levocetirizine is cetirizine's active component, so together they double the dose.", "Reduce to 2.5 mg in mild renal impairment.", "Does not replace photoprotection or stopping a photosensitising drug if one is implicated." ], "peds_mgkg_low": null, "peds_mgkg_high": null, "peds_max_mg": null, "peds_basis": null, "peds_unit": null, "peds_note": "Age 6-11y: 2.5 mg (1/2 scored tablet) PO once daily in evening; age <6y: use oral solution.", "peds_min_weight_kg": null, "peds_max_weight_kg": null, "peds_age_min_months": null, "peds_age_max_months": null, "peds_age_bands": null, "peds_doses": null, "brands": [ { "trade_name": "ZALKEVOR 5 MG 10 F.C.TABS.", "scientific_name": null, "normalized_ingredient": null, "manufacturer": "EL-OBOUR > REPHARMA", "price_egp": 5.5, "pack_count": 10, "unit_price": 0.55, "strength_mg": 5.0, "exact_strength": true, "exact_form": true, "discontinued": false, "also_contains": null }, { "trade_name": "RHIPGIC 5 MG 30 F.C. TABS.", "scientific_name": null, "normalized_ingredient": null, "manufacturer": "P & C LABS", "price_egp": 19.5, "pack_count": 30, "unit_price": 0.65, "strength_mg": 5.0, "exact_strength": true, "exact_form": true, "discontinued": false, "also_contains": null }, { "trade_name": "LERGOPAN 5 MG 10 F.C.TABS.", "scientific_name": null, "normalized_ingredient": null, "manufacturer": "PHAROPHARMA", "price_egp": 7.5, "pack_count": 10, "unit_price": 0.75, "strength_mg": 5.0, "exact_strength": true, "exact_form": true, "discontinued": false, "also_contains": null }, { "trade_name": "LEVOCITRONE 5 MG 10 F.C.TABS.", "scientific_name": null, "normalized_ingredient": null, "manufacturer": "EGYPHAR", "price_egp": 21.0, "pack_count": 10, "unit_price": 2.1, "strength_mg": 5.0, "exact_strength": true, "exact_form": true, "discontinued": false, "also_contains": null }, { "trade_name": "RAMATRIZINE 5 MG 30 F.C.TABS.", "scientific_name": null, "normalized_ingredient": null, "manufacturer": "EGPI > RAMAPHARMA", "price_egp": 96.0, "pack_count": 30, "unit_price": 3.2, "strength_mg": 5.0, "exact_strength": true, "exact_form": true, "discontinued": false, "also_contains": null }, { "trade_name": "LEVOHISTAM 5 MG 30 F.C.TABS.", "scientific_name": null, "normalized_ingredient": null, "manufacturer": "EGPI > UTOPIA", "price_egp": 117.0, "pack_count": 30, "unit_price": 3.9, "strength_mg": 5.0, "exact_strength": true, "exact_form": true, "discontinued": false, "also_contains": null }, { "trade_name": "ARAXILEVE 5 MG 30 ORO-DISPERSIBLE TABS.", "scientific_name": null, "normalized_ingredient": null, "manufacturer": "JEDCO INT. CO. FOR PHARMACEUTICALS > ARAX PHARM. IND.", "price_egp": 51.0, "pack_count": null, "unit_price": null, "strength_mg": 5.0, "exact_strength": true, "exact_form": true, "discontinued": false, "also_contains": null }, { "trade_name": "LEVCET 5MG 20 ORODISSOLVABLE TABS.", "scientific_name": null, "normalized_ingredient": null, "manufacturer": "MARCYRL PHARMACEUTICAL INDUSTRIES (MPI)", "price_egp": 85.0, "pack_count": null, "unit_price": null, "strength_mg": 5.0, "exact_strength": true, "exact_form": true, "discontinued": false, "also_contains": null }, { "trade_name": "MERVOZA 2.5MG/5ML SYRUP 120 ML", "scientific_name": null, "normalized_ingredient": null, "manufacturer": "GLOBAL NAPI PHARMACEUTICALS", "price_egp": 8.0, "pack_count": null, "unit_price": null, "strength_mg": 2.5, "exact_strength": false, "exact_form": false, "discontinued": false, "also_contains": null }, { "trade_name": "MODALLERGE 0.5MG/ML ORAL SOL.", "scientific_name": null, "normalized_ingredient": null, "manufacturer": "EGPI > MODERN PHARMA", "price_egp": 8.0, "pack_count": null, "unit_price": null, "strength_mg": 0.5, "exact_strength": false, "exact_form": false, "discontinued": false, "also_contains": null } ], "condition_id": "photoallergic-reaction" } ] }