I have nearly chronic sinusitis - I've had 3 infections just this year alone. As a result I've tried just about every prescription and non-prescription drug for sinusitis on the market. Nearly all of them make me drowsy, including the 'non-drowsy' types. On a lark, I picked up a packet of LemSip Sinus Max gelcaps.
Wow!! This product contains caffeine, which counteracts the overwhelming fatigue and weakness that goes with sinusitis. It also has phenylephrine as a decongestant. It worked a real treat on me.
I'm cautiously optimistic, most products become ineffective for me after a while, but this one will be a staple in our medicine box.