Alvimopan is a gastroprokinetic peripheral mu-opioid receptor antagonist. As a drug, Alvimopan is given to patients undergoing bowel surgery to protect the bowel from the effects of opioid medications that are used to treat pain, blocking the undesirable GI side-effects of the opioid agonists without affecting analgesia or causing withdrawal. Alvimopan does not cross the blood-brain barrier, competitively binding to gastrointestinal tract mu-opioid receptors.
| Molecular Weight | 424.53 |
| Formula | C25H32N2O4 |
| CAS Number | 156053-89-3 |
| Solubility (25°C) | DMSO: 10 mg/mL |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
| Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
[2] Shahnaz Sultan, et al. Alvimopan for recovery of bowel function after radical cystectomy
[3] Heather R Bream-Rouwenhorst, et al. Alvimopan for postoperative ileus
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