Other solubility control agents may additionally or alternatively be used, including waxes, such as waxes of natural origin, polyethylene waxes an amide waxes; long chain (eg. containing more than 10 carbon atoms) fatty alcohols such as stearyl or behenyl alcohol; long chain, (eg. containing more than 10 carbon atoms) fatty acids, such as stearic acid, and their salts; esters of long chain fatty a