| abstract |
The invention relates to a salt or co-crystal of 3- (3-dimethylamino-1-ethyl-2-methyl-propyl) -phenol (component a) and at least one acid component (b1) or at least one acid component (b2), where the salt or co-crystal of component (a) and component (b2) are present in crystalline and / or amorphous form, to a medicament comprising salt or co-crystal, as well as to salt or co-crystal for use in the treatment of pain. |