H1-antihistamines are probably the most frequently used drugs in allergic diseases, with widely established efficacy, tolerance, and safety. We report a patient with urticaria due to ingestion of ebastine and fexofenadine. Skin prick tests, patch tests, and basophil activation tests with the implicated drugs and antihistamines from other families were negative. The oral challenges with the impl...

Antihistamines (Histamine receptor antagonists) are widely prescribed medicines in the treatment of allergic disorders, especially the symptoms of hypersensitivity reactions, mainly blocking the activity of vasoactive amines to their receptors. Drug adverse reactions such as sleepiness and dry mouth are frequently encountered. However, drug hypersensitivity provoking itchy hives by antihistamin...

OBJECTIVE To critically review the body of clinical trials that refute or support the efficacy of antihistamines in relieving pruritus in patients with atopic dermatitis. DESIGN Review of MEDLINE from 1966 through March 1999, the Cochrane Database of Systematic Reviews, and Best Evidence to identify therapeutic trials of antihistamines in patients with atopic dermatitis. MAIN OUTCOME MEASUR...

-In mice with a transplantable mammary carcinoma, treatment with the prostaglandin-synthesis inhibitors flurbiprofen or indomethacin produced various beneficial effects. Survival time after excision of the transplanted tumour was increased, particularly when the drugs were given with the chemotherapeutic agents methrotrexate and melphalan, and there were more disease-free survivors. The combine...

In this review, we compare and contrast the clinical pharmacology, efficacy, and safety of first-generation H1 antihistamines and second-generation H1 antihistamines. First-generation H1 antihistamines cross the blood-brain barrier, and in usual doses, they potentially cause sedation and impair cognitive function and psychomotor performance. These medications, some of which have been in use for...

Histamine (one of the key mediators released from mast cells and basophils), plays a major role in the pathophysiology of allergic diseases, including rhinitis, urticaria, asthma and anaphylaxis. Histamine exerts its effects through its interaction with one of four distinct receptors (H1, H2, H3, H4). In allergic disease, it is the H1 antihistamines which are of primary benefit, although H2 ant...

background: allergic rhinitis (ar) represents a global health problem, affecting 5-50% of the population worldwide and numerous classes of pharmacological agents are available for its treatment. two more popular of these drugs are loratadine and cetirizine. there are few direct comparator studies between these two drugs with inconsistent results. m aterials and methods: a randomized, double-bli...

This review provides an overview of the use of antihistamines in children. We discuss types of histamine receptors and their mechanism of action, absorption, onset and duration of action of first-generation and second-generation H(1)-antihistamines, as well as elimination of H(1)-antihistamines which has important implications for dosing in children. The rationale for the use of H(1)-antihistam...