the tablets troches pills capsules and the like may also contain the following a binder such as gum tragacanth acacia corn starch or gelatin an excipient such as dicalcium phosphate a disintegrating agent such as corn starch potato starch alginic acid and the like a lubricant such as magnesium stearate and a sweetening agent such as sucrose lactose or saccharin may be added or a flavoring agent such as peppermint oil of wintergreen or cherry flavoring when the dosage unit form is a capsule it may contain in addition to materials of the above type a liquid carrier such as a fatty oil various other materials may be present as coatings or to otherwise modify the physical form of the dosage unit for instance tablets pills or capsules may be coated with shellac sugar or both a syrup or elixir may contain the active compounds sucrose as a sweetening agent methyl and propyl parabens as preservatives a dye and a flavoring such as cherry or orange flavor of course any material used in preparing any dosage unit form should be pharmaceutically pure and substantially non toxic in the amounts employed in addition the active ingredients may be incorporated into sustained release preparations preparations of this type would contain greater quantities of the active ingredients the antibiotics of the present invention may be used alone or in combination with each other or with one or more other antimalarials or drugs such combinations include for example x 14868a and ll c23024 beta ll c23024 beta and ll c23024 iota x 14868a ll c23024.