TY - JOUR
T1 - Absorption enhancement of captopril in the rat colon as a putative method for captopril delivery by extended release formulations
AU - Sintov, Amnon
AU - Simberg, Mark
AU - Rubinstein, Abraham
PY - 1996/10/25
Y1 - 1996/10/25
N2 - The absorption of captopril from aqueous solution and solid dosage form was compared in the jejunum and colon of the anesthetized rat, with and without a mixture of oleic acid and sodium oleate (OASO). Captopril was absorbed better in the jejunum than in the rat colon (32.5 ± 7.5% compared with 9.0 ± 4.6% of the administered dose, respectively). The addition of 1.0 or 2.5% of OASO significantly enhanced captopril colonic absorption, but did not affect captopril absorption from the rat jejunum. AUC(0-5h) values were increased two-fold after colonic administration of captopril-OASO solid formulations. The colonic absorption with or without OASO was characterized by flat drug plasma profiles. It is concluded that colonic delivery of captopril together with OASO could be used to sustain captopril input into the body for a prolonged period of time.
AB - The absorption of captopril from aqueous solution and solid dosage form was compared in the jejunum and colon of the anesthetized rat, with and without a mixture of oleic acid and sodium oleate (OASO). Captopril was absorbed better in the jejunum than in the rat colon (32.5 ± 7.5% compared with 9.0 ± 4.6% of the administered dose, respectively). The addition of 1.0 or 2.5% of OASO significantly enhanced captopril colonic absorption, but did not affect captopril absorption from the rat jejunum. AUC(0-5h) values were increased two-fold after colonic administration of captopril-OASO solid formulations. The colonic absorption with or without OASO was characterized by flat drug plasma profiles. It is concluded that colonic delivery of captopril together with OASO could be used to sustain captopril input into the body for a prolonged period of time.
KW - Absorption enhancers
KW - Captopril
KW - Colon
KW - Controlled drug delivery
KW - In situ absorption
UR - http://www.scopus.com/inward/record.url?scp=0030601863&partnerID=8YFLogxK
U2 - 10.1016/S0378-5173(96)04682-0
DO - 10.1016/S0378-5173(96)04682-0
M3 - Article
AN - SCOPUS:0030601863
SN - 0378-5173
VL - 143
SP - 101
EP - 106
JO - International Journal of Pharmaceutics
JF - International Journal of Pharmaceutics
IS - 1
ER -