This medicine really does help sinus issues, but boy does it make me feel like I am on speed! After an hour or so I start getting super jittery and lightheaded and my mouth gets very dry. It lasts for a few hours too! As for my sinus symptoms I did get some relief from them and I felt better for most of the day. It really helped the sinus pressure in my head and face, my nasal congestion was cleared up, and my fever was gone. I just wish they could make this medicine without the horrible after effects. Maybe had I taken it on a full stomach this would not have happened. Effectiveness Worked well at relieving my sinus symptoms and keeping them gone for most of the day. Ease of Use I think liquicaps are easier to take than other forms of pills. They are soft and seem to go down much smoother. I choke way less on this form. Immediacy Took about an hour before I started feeling better. The sinus pressure was the first thing that I had relief from. It took a little longer before my nasal passages were cleared up.