An applicator for topically applying a semi-solid medicament comprises an applicator head having an applicator face for spreading medicament across the skin a sealable aperture on the applicator face and a drive mechanism for forcing medicament out through the aperture. The applicator head includes a cartridge port at the rear of the applicator face for receiving a dispensing end of a cartridge charged with medicament. The drive mechanism comprises a dial knob rotatable around a longitudinal axis of the applicator for advancing a piston along a drive member towards the applicator head to force medicament from the cartridge and thereby dispense a predetermined dose of medicament onto the applicator face.
