The invention relates to a salt or cocrystal 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),wherein the salt or cocrystal of component (a) and component(b2) is present in crystalline and/or amorphous form, a medicament comprisingsaid salt or cocrystal as well as said salt orcocrystal for use in the treatment of pain,
