The invention relates to pharmaceutical compositions, which are self-emulsifying, self-microemulsifying, or self-nanoemulsifying in aqueous medium, comprising the compound: 2-(2,2-Difluoro-propyl)-5-[1-(2-fluoro-6-methyl-phenyl)-piperidin-4-yl]-7-(2-trifluoromethyl-benzyl)-2,4,5,7-tetrahydro-pyrazolo[3,4-d]pyrimidin-6-one and a mixture of excipients comprising one or more lipophilic excipient(s); one or more hydrophilic surfactant(s); and optionally one or more hydrophilic co-solvent(s). The invention further relates to a crystalline form of said compound, and its use for the preparation of the present compositions. The invention further relates to pharmaceutical uses of the compositions for the prevention/prophylaxis or treatment of diseases and disorders related to pathogenic events associated with elevated levels of C5a and/or with C5aR activation.