In continuation of my update on the usefulness of Casaicin...
We know that, Capsicum annum contains capsaicin, which is the main component
of chili peppers and produces a hot sensation. Capsaicin is also the
active ingredient in several topical medications used for temporary pain
relief. It is approved for use by the U.S. Food and Drug Administration
and is available over the counter.
Now researchers lead by University of Cincinnati College of Medicine, Cincinnati, Ohio, have come up with an interesting finding about Capsicum annum. As per the claim by the researchers a nasal spray containing an ingredient derived from hot chili peppers (Capsicum annum) may help people "clear up" certain types of sinus inflammation. Researchers add that, study which showed that participants who used a nasal spray with Capsicum reported a faster onset of action or relief, on average within a minute of using the spray, than the control group and the spray is safe and effective on non-allergic rhinitis.
Interestingly, this is the first controlled trial where capsaicin was able to be used
on a continuous basis to control symptoms. It is considered a
significant advance, because of the fact that in the previous trials the ingredient was too hot to administer without anesthesia.
Ref : http://www.annallergy.org/article/S1081-1206%2811%2900383-8/abstract