The present invention relates to new nalmefene salts which salts fall within at least one of the two following categories: non-hydrate forming salts and non-solvate forming salts. In particular, the invention relates to the hydrogen adipate salt, the hydrogen malonate salt, the lactate salt, the hydrogen fumarate salt, the hydrogen succinate salt, the benzene sulfonate salt, the hydrogen maleate salt and the salicylate salt of nalmefene. The present invention also relates to such salts for use in therapy.本發明涉及新的納美芬鹽，該等鹽屬於以下兩種類別中的至少一者：形成非水合物的鹽和形成非溶劑合物的鹽。具體而言，本發明涉及納美芬的己二酸氫鹽、丙二酸氫鹽、乳酸鹽、富馬酸氫鹽、琥珀酸氫鹽、苯磺酸鹽、馬來酸氫鹽以及水楊酸鹽。本發明還涉及此類鹽用於在治療中使用。
