title: Effect of diallyl trisulfide on the pharmacokinetics of dipyridamole in rats.
abstract: This study was aimed to evaluate the effect of diallyl trisulfide (DATS), a major component derived from garlic used to inhibit platelet thromboxane formation, on the pharmacokinetics of dipyridamole. Pharmacokinetic parameters of dipyridamole were determined in rats following intragastric (80 mg/kg suspension or 40 mg/kg solution) or intravenous (3 mg/kg) administration of dipyridamole with coadministration (20 mg/kg) and long-term pretreatment of DATS (10 or 20 mg/kg/day for 15 consecutive days). In addition, everted gut sac models were used to assess transepithelial transport of dipyridamole and the effect of DATS on the intestinal absorption of dipyridamole. After coadministration and long-term pretreatment of DATS, significantly lower Cmax and AUC(0-24 h) were observed for intragastric administration of dipyridamole, whereas little change was noted after intravenous dipyridamole administration. After adding DATS (10 and 50 μg/mL) in the everted gut sacs, absorption of dipyridamole was remarkably decreased in the ileum and jejunum (p < 0.01). In conclusion, DATS reduced the oral exposure of dipyridamole in rats likely by the modification of the dissolution rate and intestinal absorption of dipyridamole, indicating that combined use of DATS or DATS-containing supplements with dipyridamole may require caution as low plasma concentrations of dipyridamole may lead to a subtherapeutic effect of this agent.
authors.affiliation: Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Wang
authors.forename: Meijuan
authors.initials: M
authors.lastname: Zou
authors.forename: Nan
authors.initials: N
authors.lastname: Zhao
authors.forename: Jungang
authors.initials: J
authors.lastname: Ren
authors.forename: Hong
authors.initials: H
authors.lastname: Zhou
authors.forename: Gang
authors.initials: G
authors.lastname: Cheng
mesh_terms: D000284:Administration, Oral; D000498:Allyl Compounds / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*; D000818:Animals; D019587:Dietary Supplements / Q000009:adverse effects / Q000032:analysis; D004176:Dipyridamole / Q000008:administration & dosage / Q000009:adverse effects / Q000097:blood / Q000493:pharmacokinetics*; D004305:Dose-Response Relationship, Drug; D004347:Drug Interactions; D005737:Garlic / Q000737:chemistry; D006207:Half-Life; D041743:Herb-Drug Interactions; D007082:Ileum / Q000187:drug effects / Q000378:metabolism; D066298:In Vitro Techniques; D007275:Injections, Intravenous; D007408:Intestinal Absorption / Q000187:drug effects; D007583:Jejunum / Q000187:drug effects / Q000378:metabolism; D008297:Male; D008657:Metabolic Clearance Rate / Q000187:drug effects; D010975:Platelet Aggregation Inhibitors / Q000009:adverse effects / Q000097:blood / Q000493:pharmacokinetics* / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D012995:Solubility; D013440:Sulfides / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*
chemical_list: D000498:Allyl Compounds; D010975:Platelet Aggregation Inhibitors; D013440:Sulfides; C042577:diallyl trisulfide; D004176:Dipyridamole