The present invention relates to pharmaceutical compositions for the treatment and/or prophylaxis of protozoal infections caused by Kinetoplastida, Apicomplexa, Anaerobic protozoa and Mircosporidia comprising 2-[4-(4-chlorophenyl)cyclohexyl]-3-hydroxy-1,4-naphthoquinone or a physiologically acceptable salt or other functional derivative thereof as active ingredient and to a method of treating or preventing siad protozoal infections in an animal which comprises administering to said animal an effective amount of siad compound.
This is a continuation of copending application(s) Ser. No. 08/104,034, filed on Sep. 30, 1993", and a continuation of International Application PCT/GB 92/02344, filed on Dec. 17, 1992, and which designated the U.S."