The invention relates to a marked solid pharmaceutical form including a continuous groove on the surface thereof, said groove preferably being 20 μm to 50 μm deep and preferably 5 μm to 120 μm wide. The invention also relates to a method for marking such a pharmaceutical form by forming at least one groove therein by means of laser ablation of the surface of the solid form, said method being such that the laser ablation is carried out with laser energy of 0.1 to 500 mJ/mm2
