The present invention relates to solid dosage forms of oleyl phosphocholine (C18:1-PC), or OlPC, for oral administration. Further, the present invention relates to methods for the preparation of the present solid dosage forms and the use thereof as a medicament and especially a medicament for treatment of parasitic diseases, such as leishmaniasis, chagas and malaria, and cancer both in humans and animals. Specifically, the present invention relates to a solid dosage form comprising: 6 to 25 weight % of the solid dosage form oleyl phosphocholine; 20 to 35 weight % of the solid dosage form lactose; 35 to 50 weight % of the solid dosage form cellulose; 5 to 20 weight % of the solid dosage form croscarmellose; 1 to 10 weight % of the solid dosage form hydroxypropylmethyl cellulose; and 0.05 to 1 weight % of the solid dosage form of a lubricant.