a prepackaged , therapeutic regimen includes a non - sedating first dosage unit that includes a nasal decongestant , a second dosage unit that includes an antihistamine and an attenuated dosage of nasal decongestant , indicia for distinguishing between the first and second dosage units , administration instructions that teach the coordinated use of the first and second dosage units , and a pharmaceutical dispensing container containing the first and second dosage units and incorporating the indicia and coordinating instructions .