Comparative Pharmacology
Head-to-head clinical analysis: HYDRAMINE versus OLOPATADINE HYDROCHLORIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: HYDRAMINE versus OLOPATADINE HYDROCHLORIDE.
HYDRAMINE vs OLOPATADINE HYDROCHLORIDE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Antagonist of histamine H1 receptors, preventing histamine-mediated responses such as vasodilation, bronchoconstriction, and increased capillary permeability.
Olopatadine hydrochloride is a selective histamine H1 receptor antagonist and mast cell stabilizer. It inhibits histamine release from mast cells and prevents histamine-induced effects such as increased vascular permeability and pruritus.
50-100 mg IV/IM every 4-6 hours, maximum 400 mg per day. Also available as 50 mg oral tablets.
One drop of 0.1% or 0.2% ophthalmic solution in each affected eye twice daily (every 6-8 hours) for 0.1%; once daily for 0.2%.
None Documented
None Documented
Terminal elimination half-life 5.7 hours, range 4.2-7.7 hours; prolonged in hepatic impairment (up to 15 hours in cirrhosis)
Clinical Note
moderateDiphenhydramine + Deferasirox
"The serum concentration of Deferasirox can be increased when it is combined with Diphenhydramine."
Clinical Note
moderateDiphenhydramine + Fluticasone propionate
"The risk or severity of adverse effects can be increased when Diphenhydramine is combined with Fluticasone propionate."
Clinical Note
moderateDiphenhydramine + Tenofovir disoproxil
"The metabolism of Tenofovir disoproxil can be decreased when combined with Diphenhydramine."
Clinical Note
moderateTerminal elimination half-life of 8–12 hours in healthy adults; prolonged in hepatic impairment (up to 18 hours)
Primarily renal (95%) as metabolites; <5% unchanged; 5% fecal
Primarily renal excretion (60-70% unchanged), with minor biliary/fecal elimination (~30% as metabolites)
Category C
Category A/B
Antihistamine
Antihistamine / Mast Cell Stabilizer
Diphenhydramine + Sulfisoxazole
"The metabolism of Sulfisoxazole can be decreased when combined with Diphenhydramine."