| | Identification | More |  | [Name] 
 Cyclopenthiazide
 |  | [CAS] 
 742-20-1
 |  | [Synonyms] 
 CYCLOPENTHIAZIDE
 NAVIDREX
 2h-1,2,4-benzothiadiazine-7-sulfonamide,6-chloro-3-(cyclopentylmethyl)-3,4-dih
 3-cyclopentylmethylhydrochlorothiazidederiv
 cyclomethiazide
 navidrix
 salimed
 salimid
 su8341
 tsiklometiazid
 ydro-,1,1-dioxide
 6-chloro-3-cyclopentylmethyl-3,4-dihydro-2H-1,2,4-benzothiadiazine-7-sulphonamide 1,1-dioxide
 6-Chloro-3-[cyclopentylmethyl]-3,4-dihydro-[2H]-1,2,4-benzothiadiazine-7-sulfonamide-1,1-dioxide
 Cyclopentiazide
 2H-1,2,4-Benzothiadiazine-7-sulfonamide, 6-chloro-3-(cyclopentylmethyl)-3,4-dihydro-, 1,1-dioxide
 2H-1,2,4-Benzothiadiazine-7-sulfonamide, 6-chloro-3-(cyclopentylmethyl)-3,4-dihydro-, 1,1-dioxide (6CI, 8CI, 9CI)
 6-Chloro-3-(cyclopentylmethyl)-3,4-dihydro-7-sulfamyl-2H-1,2,4-benzothiadiazine 1,1-dioxide
 6-Chloro-3-cyclopentylmethyl-7-sulfamoyl-3,4-dihydro-1,2,4-benzothiadiazine 1,1-dioxide
 Ciba 8341-Su
 Cyclometiazid
 |  | [EINECS(EC#)] 
 212-012-5
 |  | [Molecular Formula] 
 C13H18ClN3O4S2
 |  | [MDL Number] 
 MFCD00865825
 |  | [Molecular Weight] 
 379.88
 |  | [MOL File] 
 742-20-1.mol
 | 
 | Hazard Information | Back Directory |  | [Uses] 
 Antihypertensive;Sodium Chloride Symporter Inhibitor
 |  | [Uses] 
 Cyclopenthiazide is a thiazide diuretic. Cyclopenthiazide is used in the treatment of oedema caused by conditions such as kidney disease, liver cirrhosis and pre-menstrual syndrome as well as in the treatment of hypertension.
 |  | [Definition] 
 ChEBI: 6-chloro-3-(cyclopentylmethyl)-1,1-dioxo-3,4-dihydro-2H-1$l^{6},2,4-benzothiadiazine-7-sulfonamide is a benzothiadiazine.
 |  | [World Health Organization (WHO)] 
 Cyclopenthiazide, a thiazide diuretic, was introduced in 1968. It
continues to be used mainly in combination drugs.
 |  | [Clinical Use] 
 Thiazide diuretic:
 Hypertension
 
 Heart failure
 
 Oedema
 |  | [Drug interactions] 
 Potentially hazardous interactions with other drugs
 Analgesics: increased risk of nephrotoxicity with 
NSAIDs; antagonism of diuretic effect. Anti-arrhythmics: hypokalaemia leads to increased 
cardiac toxicity; effects of lidocaine and mexiletine 
antagonised.
 Antibacterials: avoid administration with 
lymecycline.
 Antidepressants: increased risk of hypokalaemia 
with reboxetine; enhanced hypotensive effect with 
MAOIs; increased risk of postural hypotension with 
tricyclics.
 Antiepileptics: increased risk of hyponatraemia with 
carbamazepine.
 Antifungals: increased risk of hypokalaemia with 
amphotericin.
 Antihypertensives: enhanced hypotensive effect; 
increased risk of first dose hypotension with postsynaptic alpha-blockers like prazosin; hypokalaemia 
increases risk of ventricular arrhythmias with sotalol.
 Antipsychotics: hypokalaemia increases risk 
of ventricular arrhythmias with amisulpride; 
enhanced hypotensive effect with phenothiazines; 
hypokalaemia increases risk of ventricular 
arrhythmias with pimozide - avoid.
 Atomoxetine: hypokalaemia increases risk of 
ventricular arrhythmias.
 Cardiac glycosides: increased toxicity if hypokalaemia 
occurs.
 Ciclosporin: increased risk of nephrotoxicity and 
possibly hypomagnesaemia.
 Cytotoxics: increased risk of ventricular arrhythmias 
due to hypokalaemia with arsenic trioxide; increased 
risk of nephrotoxicity and ototoxicity with platinum 
compounds.
 Lithium: excretion reduced, increased toxicity
 |  | [Metabolism] 
 Cyclopenthiazide appears to be entirely excreted 
unchanged in the urine.
 | 
 |  |