-
Case Reports Clinical Trial
[Preparation of ketamine tablets for treatment of patients with neuropathic pain].
- Y Yanagihara, M Ohtani, M Matsumoto, S Kariya, K Uchino, T Hiraishi, N Ashizawa, T Aoyama, Y Yamamura, and T Iga.
- Department of Pharmacy, Tokyo Posts and Telecommunications Hospital, Japan.
- Yakugaku Zasshi. 1999 Dec 1;119(12):980-7.
AbstractKetamine is known to have distinguished analgesic effects without anesthetic when administered in a low dose. Since ketamine is not commercially available except injection forms, we prepared ketamine tablets for the home-care medication of patients with neuropathic pain. The direct compression or wet granulation method was employed to form 150 mg of tablets containing 50 mg of ketamine. The latter method was superior to the former one in terms of content uniformity, weight variation and disintegration tests of the tablets. Ketamine contents in the tablet prepared by the wet granulation method were unchanged for 12 weeks under the conditions of 25 degrees C and 75% relative humidity (RH). The Cmax and AUC0-3 h values for ketamine after administration of the tablet were slightly smaller than those of the syrup in a healthy volunteer. However, analgesic effects of the tablet was similar to that of the syrup in a patient with neuropathic pain. And the tablet was also effective for another four patients with neuropathic pain. These results indicate that ketamine tablets are useful for the home-care medication of patients with neuropathic pain.
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