May be stored at RT for short-term only. Long-term storage is recommended at -20°C. For maximum recovery of product, centrifuge the original vial prior to removing the cap.
References
Raffa, R., et al.: J. Pharm. Exp. Ther., 267, 331 (1993), Dayer, P., et al.: Drugs, 47, 3 (1994), Lai, J., et al.: Eur. J. Pharmacol., 316, 369 (1996), Poulsen, L., et al.: Clin. Pharmacol. Ther., 60, 637 (1996).