The cold medicine I took a couple hours ago is knocking me on my ass, and it's a non-drowsy formula.
The med is Suphedrine, the Fred Meyer house-brand equivalent to non-drowsy Sudafed. Active ingredients pseudoephedrine hydrochloride (decongestant), dextromethorphan hydrobromide (cough suppressant, although I haven't had trouble with coughing), and acetaminophen (pain relief/fever reduction).
None of those ingredients has caused me trouble in the past but right now it's all I can do to keep my eyes open.
Must. Go to bed. Early. Tonight.