The subject of the present invention is solid dosage form containing cytisine and ancillary substances characterised in that it contains from 0.1% to 5% micronised cytisine, wherein all molecules have a diameter less than from 10 μπι, corn starch from 40% to 60%, preferably 99.9% particles sized from 5 μπι to 25 μπι, macrocrystalline cellulose in an amount from 40% to 60%, preferably the particle size is : 99% below 38 μπι, wherein the mass ratio of ancillary substances to the active ingredient is from 1 : 19 to 1 : 999 and is in the form of a hard capsule as well as a method of obtaining it.