it is possible for the active ingredient to be administered alone it is preferable to present it as a composition preferably as a pharmaceutical composition the formulation of such compositions is well known to those skilled in the art the composition may contain any suitable carriers diluents or excipients these include all conventional solvents dispersion media fillers solid carriers coatings antifungal and antibacterial agents dermal penetration agents surfactants isotonic and absorption agents and the like it will be understood that the compositions of the invention may also include other supplementary physiologically active agents the carrier must be pharmaceutically u201c acceptable u201d in the sense of being compatible with the other ingredients of the composition and not injurious to the subject compositions include those suitable for oral rectal nasal topical including buccal and sublingual vaginal or parenteral including subcutaneous intramuscular intravenous and intradermal administration the compositions may conveniently be presented in unit dosage form and may be prepared by any methods well known in the art of pharmacy such methods include the step of bringing into association the active ingredient with the carrier which constitutes one or more accessory ingredients in general the compositions are prepared by uniformly and intimately bringing into association the active ingredient with liquid carriers or finely divided solid carriers or both and then if necessary shaping the product compositions of the present invention suitable for oral administration may be presented as discrete units such as capsules sachets or tablets each containing a predetermined amount of the active ingredient as a powder or granules as a solution or a.