| abstract |
Disclosed is a stable solid preparation comprising a 4,5-epoxymorphinan derivative or a pharmacologically acceptable acid addition salt thereof as an active ingredient. Specifically disclosed is a stable solid preparation comprising: a 4,5-epoxymorphinan derivative represented by the general formula (I) or a pharmacologically acceptable acid addition salt thereof as an active ingredient; sodium thiophosphate; a sugar or a sugar alcohol; and a hydroxypropylcellulose having a low degree of substitution in an amount of 1 to 30% by weight per unit weight of the total amount of the active ingredient, sodium thiophosphate and the sugar or the sugar alcohol. |