A combination of dosage units for alleviating respiratory ailments and a method of alleviating respiratory ailments which uses this combination of dosage units. The dosage units comprise one or more first dosage units comprising pseudoephedrine and/or a pharmaceutically acceptable salt thereof and one or more second dosage units comprising phenylephrine and/or a pharmaceutically acceptable salt thereof. This Abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.