In anaphylactic reactions it does switch off the cells that are releasing histamine …
Allergic reactions involve the release of histamine , a chemical that triggers inflammation and swelling.
Quercetin reduces histamine degranulation and the subsequent release of histamine and inflammatory leukotrienes.
The allergic reaction causes the cells to release histamine , a chemical which prompts the sneezing and itching impulse.
Opioids can cause itching, by releasing histamine from mast cells.
Depending on the specific drug, there may be effects on muscarinic, adrenergic, or histaminic receptors.
Antipsychotics with lower potency have a greater affinity for histaminic , alpha-adrenergic and muscarinic receptors.
This drug has minimal activity at histaminic , serotonergic, cholinergic or adrenergic receptor sites.