Solid dosage form comprising micronized cytisine and its production method

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.