The present invention relates to novel pharmaceutical preparations containing olaparib of formula I, systematically 4-[(3-[(4-cyclopropylcarbonyl)piperazin-4-yl]carbonyl)-4-fluorophenyl]methyl(2H)-phtalazin-1-one, with enhanced bioavailability, stability, or possibly reduced dosage of the active ingredient, a preparation method of these drug forms and their use for the treatment of cancer.