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A phototoxic substance is a chemical compound which becomes toxic when exposed to light. Some medicines: tetracycline antibiotics, sulfonamides, amiodarone, quinolones, psoralen; Many cold pressed citrus essential oils such as bergamot oil [3] Some plant juices: parsley, lime, and Heracleum mantegazzianum
Photodermatoses can be categorized into primary or secondary photodermatoses based on the cause of the reaction. Primary photodermatoses are immunology mediated or caused by chemical/drug exposure. An example of primary photodermatoses is Polymorphous light eruption. Polymorphous light eruption is the most common type of photodermatoses.
Photosensitive drug reaction secondary to medications may cause phototoxic, photoallergic, and lichenoid reactions, and photodistributed telangiectasias, as well as pseudoporphyria. [ 1 ] : 121 Drugs involved include naproxen and doxycycline .
Sometimes termed "photoaggravated", [18] and divided into two categories, phototoxic and photoallergic, PCD is the eczematous condition which is triggered by an interaction between an otherwise unharmful or less harmful substance on the skin and ultraviolet light (320–400 nm UVA) (ESCD 2006), therefore manifesting itself only in regions where ...
Sunlight, especially its ultraviolet radiation component, can cause increased or additional types of damage in predisposed individuals, such as those taking certain phototoxic drugs, or those with certain conditions associated with photosensitivity, including: Psoriasis [5] Atopic eczema [5] Mastocytosis; Mast cell activation syndrome ...
The US Food and Drug Administration on Friday approved a medication called Xolair to help lessen the severity of an accidental allergic reaction in people who are allergic to multiple foods.
Photodermatitis, sometimes referred to as sun poisoning or photoallergy, is a form of allergic contact dermatitis in which the allergen must be activated by light to sensitize the allergic response, and to cause a rash or other systemic effects on subsequent exposure.
A drug allergy is an allergy to a drug, most commonly a medication, and is a form of adverse drug reaction. Medical attention should be sought immediately if an allergic reaction is suspected. An allergic reaction will not occur on the first exposure to a substance.