If a mother is breastfeeding, antihistamines may reduce milk production and could result in drowsiness of the infant, so are best avoided.
New antihistamines include rupatidine, which is similar to loratidine. Terfenadine (Teldane™) and astemisole (Hismanal™) have been withdrawn from the New Zealand market.
PERENNIAL VERSUS SEASONAL ALLERGIC RHINITIS Perennial AR occurs year-round regardless of season and is triggered by aeroallergens such as dog/cat dander, dust mite residue, cosmetics, cockroaches, and mold.
AR is characterized by 1 or more of the following symptoms: nasal congestion, rhinorrhea, sneezing, and itching.
Histamine is stored in granules within mast cells together with other vasoactive chemicals.
Histamine release occurs in the following skin conditions: Antihistamines are medications that counteract the effect of the natural chemical histamine.
H2 blockers have also been found helpful for some patients with urticaria.
H2 blockers available in New Zealand include: See the Derm Net NZ bookstore New Zealand approved datasheets are the official source of information for medicines, including approved uses and risk information.
Allergies often manifest after several seasonal exposures to the same set of pollens or potential allergens.
Because pharmacists are often asked to make OTC recommendations for AR relief, they must be aware of the prevalence, etiologies, and manifestations of AR, and approaches to its treatment.
Ophthalmic symptoms include red, itching, and tearing eyes.
AR can be associated with comorbidities, such as asthma, sinusitis, otitis media, and sleep apnea.
There are at least two kinds of histamine receptors, hence are mainly H1 blockers.