 [ Symptoms ] i was diagnosed with mononucleosis 7 months ago since then i have not been able to recover [ Disease ] i researched one of the many don drowsy decongestants drixoral generic name  pseudoephedrine  on drugs com some brand names for this medicine include chlor trimeton non drowsy contac cold nasofed seudotabs siledrine sudefed and found in many other non drowsy decongestants some of the serious side effects to be listed on their label include fast pounding or uneven heartbeat severe dizziness or anxiety dangerously high blood pressure anxiety confusion fast  pounding or uneven heartbeat and severe dizziness less serious side effects include loss of appetite feeling restless or excited and sleep problems insomnia a label warning states avoid taking this medication if you also take diet pills caffeine pills or other stimulants such as adhd medications taking a stimulant together with a decongestant can increase your risk of unpleasant side effects summary this particular non drowsy decongest seems to have similar properties and side effects seen in other non drowsy decongestants your husband is sleep experience was more than likely due to the non drowsy decongestant that he consumed your characterization of the non drowsy decongestant as possibly being stimulating seems to be a reasonable conclusion and i would not take this type of medication during the evening hours prior to bedtime