Sedating antihistamines effect is related to Script of sex chat
Second, they have unwanted side effects, particularly central nervous system and anti-cholinergic effects, and have the potential for causing severe toxic reactions which are not shared by second-generation H.However, levocetirizine may cause somnolence in susceptible individuals while fexofenadine has a relatively short duration of action requiring twice daily administration for full all round daily protection.
Antihistamines induce drowsiness by working against histamine, a chemical produced by the central nervous system.Histamine is stored in Antihistamines are medications that counteract the effect of the natural chemical histamine.They are valuable drugs to reduce symptoms due to allergic diseases, especially those mediated by histamine.Antihistamines are inhibitors of histamine receptors. H1-antihistamines, inhibit competitively H1 receptors and the corresponding effects i. They do not inhibit antigen/antibodies reactions, nor histamine release, they inhibit H1 effects. H1-antihistamines have been used for more than fifty years in treating various allergic manifestations. H1-antihistamines which penetrate into brain elicit, by inhibiting stimulant effect of histamine, drowsiness.