Cocaine is a tropane alkaloid and stimulant drug obtained primarily from the leaves of two coca ... Topical cocaine can be used as a local numbing agent to help with painful procedures in the mouth or nose. ... placed in the nostril for the 10–15 minutes immediately before the procedure, thus performing the dual role of both .... Stick it up your nostril that hurts and in about 3-4 minutes and you should feel fine ... lining of the nasal passages because dried out, leading to burning