preferably within 1 of a given value or range the terms u201c alkyl u201d and u201c alkenyl u201d as used herein include linear and branched alkyl and alkenyl substituents respectively the phrase u201c pharmaceutically acceptable u201d refers to additives or compositions that are physiologically tolerable and do not typically produce an allergic or similar untoward reaction such as gastric upset dizziness and the like when administered to a mammal by u201c condition or disorder caused by a virus u201d is meant any condition or disorder in an animal that is either caused by complicated by or aggravated by a virus such conditions or disorders include but are not limited to those caused by viruses of the herpes family for example herpes simplex 1 and 2 viruses hsv 1 hsv 2 varicella zoster virus vzv cytomegalovirus cmv epstein barr virus ebv and other herpes virus infections e g feline herpes virus infections as used herein the term u201c treat u201d includes one or more of the following a arresting delaying the onset i e the period prior to clinical manifestation of a disorder and or reducing the risk of developing or worsening a disorder b relieving or alleviating at least one symptom of a disorder in a mammal including for example hypercalcemia or c relieving or alleviating the intensity and or duration of a manifestation of a disorder.