Other
Heterocyclic compounds with nitrogen hetero-atom(s) only: > Other: > Other: > Aromatic or modified aromatic: > Other: > Drugs: > Cardiovascular drugs: > Other
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 2933.99.53.00
Diltiazem Hydrochloride
Diltiazem hydrochloride is a benzothiazepine derivative calcium channel antagonist used for hypertension, angina, and arrhythmias. Its nitrogen-containing heterocyclic structure qualifies it for HTS 2933.99.53.00 as an aromatic cardiovascular drug. Imported typically as bulk API powder for tablet manufacturing.
Felodipine
Felodipine is a vasoselective dihydropyridine calcium channel blocker for essential hypertension treatment. This aromatic nitrogen-heterocycle classifies under HTS 2933.99.53.00 as a cardiovascular drug in bulk form. Imported as free base or specific polymorphs for extended-release formulations.
Isradipine
Isradipine, a 1,4-dihydropyridine derivative, selectively blocks L-type calcium channels for hypertension therapy. Its nitrogen-heterocyclic aromatic structure fits HTS 2933.99.53.00 as a cardiovascular drug API. Typically imported as micronized powder for tablet coating.
Nifedipine
Nifedipine is the prototype dihydropyridine calcium channel blocker used for angina and hypertension. This nitro-substituted aromatic heterocycle with nitrogen hetero-atoms classifies under HTS 2933.99.53.00. Bulk API imported under nitrogen atmosphere due to light sensitivity.
Nimodipine
Nimodipine is a lipophilic 1,4-dihydropyridine indicated for cerebral vasospasm prevention post-subarachnoid hemorrhage. As a nitrogen-heterocyclic cardiovascular drug, it falls under HTS 2933.99.53.00. Imported as oily liquid or powder for IV and oral formulations.
Pravastatin Sodium
Pravastatin sodium, a hydrophilic HMG-CoA reductase inhibitor, lowers LDL cholesterol in cardiovascular disease prevention. Its complex nitrogen-heterocyclic structure qualifies under HTS 2933.99.53.00 as a cardiovascular drug. Sodium salt form imported as spray-dried amorphous powder.
Clopidogrel Bisulfate
Clopidogrel bisulfate, a thienopyridine P2Y12 inhibitor, prevents thrombotic events in cardiovascular patients. This aromatic nitrogen-heterocycle classifies under HTS 2933.99.53.00 as a cardiovascular antiplatelet drug. Form I crystalline powder imported for tablet manufacture.
Ticlopidine Hydrochloride
Ticlopidine hydrochloride, first-generation thienopyridine, inhibits platelet aggregation for stroke prevention. Nitrogen-heterocyclic aromatic structure places it in HTS 2933.99.53.00 as cardiovascular drug API. Less common but imported for niche generic markets.
Cilostazol
Cilostazol is a quinolinone phosphodiesterase III inhibitor used for intermittent claudication in peripheral artery disease. Its nitrogen-heterocyclic structure qualifies under HTS 2933.99.53.00 as cardiovascular drug. Bulk powder for 50/100mg tablet production.
Dronedarone Hydrochloride
Dronedarone hydrochloride, multichannel blocker for atrial fibrillation, has complex nitrogen-heterocyclic structure. Classifies under HTS 2933.99.53.00 as antiarrhythmic cardiovascular drug. Hydrochloride salt imported as Form II crystals.
Ivabradine Hydrochloride
Ivabradine hydrochloride selectively inhibits funny current (If) in sinoatrial node for heart rate reduction in chronic heart failure. Nitrogen-heterocyclic aromatic compound under HTS 2933.99.53.00. Bulk API as crystalline HCl salt.
Amlodipine Besylate
Amlodipine besylate is a dihydropyridine calcium channel blocker used primarily for treating hypertension and angina. As a heterocyclic compound with nitrogen hetero-atoms in its aromatic structure, it falls under HTS 2933.99.53.00 as a cardiovascular drug. This classification applies to its pure chemical form imported for pharmaceutical use.
Verapamil Hydrochloride
Verapamil hydrochloride, a phenylalkylamine calcium channel blocker, treats hypertension, angina, and supraventricular tachycardia. This synthetic aromatic heterocycle with nitrogen hetero-atoms is classified under HTS 2933.99.53.00 for cardiovascular drugs. Bulk powder form for generic pharmaceutical production.
Labetalol Hydrochloride
Labetalol hydrochloride is a combined alpha- and beta-adrenergic blocker used for severe hypertension management. Its aromatic heterocyclic nitrogen structure places it in HTS 2933.99.53.00 as a cardiovascular drug API. Typically imported as sterile powder for injectable or tablet formulations.
Nicardipine Hydrochloride
Nicardipine hydrochloride, a dihydropyridine calcium antagonist, treats acute hypertension and angina. As a nitrogen-heterocyclic aromatic compound, it qualifies under HTS 2933.99.53.00 for cardiovascular drug imports. Bulk API typically in crystalline powder form.