patient should be at least the amount required to minimize reduce or eliminate one or more of the symptoms associated with the disease or condition treated for example in the case of rhinitis sufficient drug should be administered to reduce rhinorrhea and or alter airway resistance ordinarily a unit dose should contain between 1 and 100 u03bcg of active agent with the optimal daily dose being determined by methods well known in the art dosages may be provided either in a single or multiple daily regimen the present invention is not limited to any particular dosage form or route of administration although inhalation will generally be most convenient and is preferred in the treatment of rhinitis and bronchial conditions parenteral transdermal sublingual peroral nasal rectal vaginal auricular implantable or other routes of administration may be used as well therapeutic agents may be administered in a substantially purified form or as part of a pharmaceutical composition containing one or more excipients flavoring agents or other active ingredients preparations may be solid or liquid or take any of the pharmaceutical forms presently used in human medicine e g tablets powders solutions creams ointments suspensions gel capsules granules suppositories transdermal compositions or injectable preparations the active agents may be incorporated into dosage forms in conjunction with the vehicles that are commonly employed in pharmaceutical preparations e g talc gum arabic lactose starch magnesium stearate cocoa butter aqueous or non aqueous solvents oils paraffin derivatives glycols etc methods for preparing appropriate formulations are well known in the art see e g remington 39 s pharmaceutical sciences.