A pharmaceutical dosage form for controlled release of the active substance 3-(2-dimethylaminomethylcyclohexyl)-phenol, preferably (1R,2R)-3-(2-dimethylaminomethylcyclohexyl)-phenol, or a pharmaceutically acceptable salt thereof, which dosage form (i) in vivo produces a peak plasma level of the active substance after 2 to 10 hours, and/or (ii) in vitro releases 3.0 to 37 percent by weight of the active substance originally contained in the dosage form after one-half hour, 5.0 to 56 percent by weight after one hour, 10 to 77 percent by weight after two hours, 15 to 88 percent by weight after 3 hours, at least 30 percent by weight after six hours, at least 50 percent by weight after 12 hours, at least 70 percent by weight after 18 hours, and at least 80 percent by weight after 24 hours when measured according to the European pharmacopoeia using a blade mixer in preferably 900 ml of a buffer solution at a pH value of 6.9, a temperature of 37° C., and 75 rpm.
