This information is for educational purposes only. It is not intended as medical advice. Always consult a qualified healthcare professional.
OTC
DILTIAZEM HYDROCHLORIDE
INN: DILTIAZEM HYDROCHLORIDE
Data updated: 2026-05-09
Available in:
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About This Product
Manufacturer
User Reviews
Reviews reflect personal experiences and are not medical advice. Always consult your doctor.
EUGIA PHARMA INC.
ATC Code
C08DB01
Source
DPD · 02535947
USDailyMed:Diltiazem
AU:C
C05AE03(WHO)C08DB01(WHO)
AU:S4(Prescription only)UK:POM(Prescription only)US:℞-onlyEU:Rx-onlyIn general: ℞ (Prescription only)
cis-(+)-[2-(2-Dimethylaminoethyl)-5-(4-methoxyphenyl)-3-oxo-6-thia-2-azabicyclo[5.4.0]undeca-7,9,11-trien-4-yl]ethanoate
42399-41-7Y
39186
2298
DB00343Y
35850Y
EE92BBP03H
D07845Y
CHEBI:101278Y
ChEMBL23Y
D6C (PDBe,RCSB PDB)
DTXSID9022940
Interactive image
O=C2N(c3c(S[C@@H](c1ccc(OC)cc1)[C@H]2OC(=O)C)cccc3)CCN(C)C
InChI=1S/C22H26N2O4S/c1-15(25)28-20-21(16-9-11-17(27-4)12-10-16)29-19-8-6-5-7-18(19)24(22(20)26)14-13-23(2)3/h5-12,20-21H,13-14H2,1-4H3/t20-,21+/m1/s1YKey:HSUGRBWQSSZJOP-RTWAWAEBSA-NY
Diltiazem, sold under the brand nameCardizemamong others, is anondihydropyridine calcium channel blockermedication used to treathigh blood pressure,angina, and certainheart arrhythmias.It may also be used inhyperthyroidismifbeta blockerscannot be used.It is takenby mouthor given byinjection into a vein.When given by injection, effects typically begin within a few minutes and last a few hours.
Common side effects include swelling, dizziness, headaches, andlow blood pressure.Other severe side effects include anoverly slow heart beat,heart failure, liver problems, and allergic reactions.Use is not recommended duringpregnancy.It is unclear if use whenbreastfeedingis safe.
Diltiazem works by relaxing thesmooth musclein the walls ofarteries, resulting in them opening and allowing blood to flow more easily.Additionally, it acts on theheartto prolong the period until it can beat again.It does this by blocking the entry of calcium into the cells of the heart and blood vessels.It is aclass IV antiarrhythmic.
Diltiazem was approved for medical use in the United States in 1982.It is available as ageneric medication.In 2023, it was the 106th most commonly prescribed medication in the United States, with more than 6million prescriptions.An extended release formulation is also available.