Antihistamines
Heterocyclic compounds with nitrogen hetero-atom(s) only: > Other: > Other: > Aromatic or modified aromatic: > Other: > Drugs: > Antihistamines
Duty Rate (from China)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified under HTS 2933.99.26.00
Cetirizine Hydrochloride
Cetirizine hydrochloride is a second-generation antihistamine used primarily for treating allergic rhinitis and urticaria. It features a piperazine heterocyclic ring with nitrogen hetero-atoms and an aromatic structure, classifying it under HTS 2933.99.26.00 as an aromatic antihistamine drug.
Loratadine
Loratadine is a tricyclic antihistamine with nitrogen-containing heterocyclic rings, used for allergy relief without causing drowsiness. Its aromatic modified structure qualifies it as an antihistamine drug under HTS 2933.99.26.00.
Fexofenadine Hydrochloride
Fexofenadine hydrochloride, a carboxylic acid derivative antihistamine, contains piperidine and aromatic rings with nitrogen hetero-atoms. It is imported as the active ingredient for allergy medications under HTS 2933.99.26.00.
Desloratadine
Desloratadine, an active metabolite of loratadine, is a potent H1-receptor antagonist with tricyclic nitrogen-heterocyclic structure. As an aromatic antihistamine drug, it falls under HTS 2933.99.26.00.
Levocetirizine Dihydrochloride
Levocetirizine dihydrochloride is the R-enantiomer of cetirizine, featuring piperazine nitrogen hetero-atoms in an aromatic framework. Classified as an antihistamine drug under HTS 2933.99.26.00.
Rupatadine Fumarate
Rupatadine fumarate is a dual antihistamine/PAF antagonist with nitrogen-heterocyclic and aromatic components. It qualifies as an antihistamine drug under HTS 2933.99.26.00 per chapter notes on salts.
Bilastine
Bilastine is a novel antihistamine with piperidine nitrogen hetero-atom in its aromatic heterocyclic structure, used for allergic rhinoconjunctivitis. It is specifically covered as an antihistamine drug in HTS 2933.99.26.00.
Ebastine
Ebastine, a piperidine-based H1-antihistamine, contains nitrogen hetero-atoms in its heterocyclic aromatic framework. Imported primarily as API for allergy treatment under HTS 2933.99.26.00.