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  2. Drug-induced urticaria - Wikipedia

    en.wikipedia.org/wiki/Drug-induced_urticaria

    Some medications, like opioids and certain other drugs, induce urticaria by directly acting on mast cells, triggering histamine release. [2] Non-steroidal anti-inflammatory drugs (NSAIDs) contribute uniquely to urticaria by inhibiting the COX-1 pathway, leading to increased production of leukotrienes , vasodilators implicated in edema and ...

  3. Drug-induced pruritus - Wikipedia

    en.wikipedia.org/wiki/Drug-induced_pruritus

    Another class of medications known to occasionally cause itching is known as serotonin reuptake inhibitors. [3] Itching is one of the most frequent adverse effects of opioid therapy. [4] A common artificial colloid used in clinical fluid management is hydroxyethyl starch (HES).

  4. Dermatographic urticaria - Wikipedia

    en.wikipedia.org/wiki/Dermatographic_urticaria

    In a normal case, the swelling will decrease without treatment within 15–30 minutes, but, in extreme cases, itchy red welts may last anywhere from a few hours to days. In some cases, welts are accompanied with a painful burning sensation. [3] This calls for more urgent treatment as the condition can impact on the patient's quality of life.

  5. Fixed drug reaction - Wikipedia

    en.wikipedia.org/wiki/Fixed_drug_reaction

    A painful and itchy reddish/purple patch of skin that occurs in the same location with repeated exposures to the causative drug is the classic presentation of a fixed drug reaction. The lips, genitals, and hands are often involved.

  6. What to do about your allergies if they're keeping you up at ...

    www.aol.com/news/how-to-stop-allergies-keeping...

    Ways to stop hay fever and other allergies ruining your sleep.

  7. Antipruritic - Wikipedia

    en.wikipedia.org/wiki/Antipruritic

    Antipruritics, abirritants, [1] or anti-itch drugs, are medications that inhibit itching (Latin: pruritus).Itching is often associated with sunburns, allergic reactions, eczema, psoriasis, chickenpox, fungal infections, insect bites and stings like those from mosquitoes, fleas, mites, and contact dermatitis and urticaria caused by plants such as poison ivy (urushiol-induced contact dermatitis ...

  8. Drug rash with eosinophilia and systemic symptoms - Wikipedia

    en.wikipedia.org/wiki/Drug_rash_with_eosinophil...

    The symptoms of DRESS syndrome usually begin 2 to 6 weeks but uncommonly up to 8–16 weeks after exposure to an offending drug. Symptoms generally include fever, an often itchy rash which may be morbilliform or consist mainly of macules or plaques, facial edema (i.e. swelling, which is a hallmark of the disease), enlarged and sometimes painful lymph nodes, and other symptoms due to ...

  9. Rebound effect - Wikipedia

    en.wikipedia.org/wiki/Rebound_effect

    The rebound effect, or pharmaceutical rebound phenomenon, is the emergence or re-emergence of symptoms that were either absent or controlled while taking a medication, but appear when that same medication is discontinued, or reduced in dosage. In the case of re-emergence, the severity of the symptoms is often worse than pretreatment levels.