as salts may be appropriate examples of pharmaceutically acceptable salts are organic acid addition salts formed with acids which form a physiological acceptable anion for example tosylate methanesulfonate acetate citrate malonate tartarate succinate benzoate ascorbate alpha ketoglutarate and alpha glycerophosphate suitable inorganic salts may also be formed including hydrochloride sulfate nitrate bicarbonate and carbonate salts pharmaceutically acceptable salts may be obtained using standard procedures well known in the art for example by reacting a sufficiently basic compound such as an amine with a suitable acid affording a physiologically acceptable anion alkali metal for example sodium potassium or lithium or alkaline earth metal for example calcium salts of carboxylic acids can also be made the compounds of formula i and formula ii can be formulated as pharmaceutical compositions and administered to a mammalian host such as a human patient in a variety of forms adapted to the chosen route of administration i e orally or parenterally by intravenous intramuscular topical or subcutaneous routes thus the present compounds may be systemically administered e g orally in combination with a pharmaceutically acceptable vehicle such as an inert diluent or an assimilable edible carrier they may be enclosed in hard or soft shell gelatin capsules may be compressed into tablets or may be incorporated directly with the food of the patient 39 s diet for oral therapeutic administration the active compound may be combined with one or more excipients and used in the form of ingestible tablets buccal tablets troches.