Benzocaine is a local anesthetic commonly used as a topical pain reliever. It is the active ingredient in many over-the-counter anesthetic ointments (e.g. products for oral ulcers of Anbesol by Wyeth, Kank+a by Blistex, Orabase B and Orajel by Del Pharmaceuticals, and Ultracare by Ultradent). It is also combined with antipyrine to form A/B Otic Drops, (Brand name Auralgan) to relieve earpain and remove cerumen.
Benzocaine has become the most commonly encountered sophisticated 'bulking agent' for cocaine in the UK.[6] It is being imported in barrels, often 25 kilograms, and sold within the domestic cocaine market where it is used to at least double the weight of imported cocaine. This cocaine is often then repressed into a block and stamped with a logo to suggest it has been freshly imported to the UK from source or transit locations. Benzocaine is visually very similar to cocaine and therefore does not detract from the appearance of quality. One of the other features of this substance is that it remains within the cocaine when it is subjected to Crack manufacture and has subsequently been attributed the slang name of 'magic'. Previous less compatible and inert cutting agents are evaporated within the process and therefore expose extensive adulteration. Benzocaine increases the volume of crack produced and disguises the lower quality or purity as it binds to the cocaine becoming visually indistinguishable within the Crack. The influence of benzocaine has been a significant contributor to the remarkable price increase in high purity cocaine in the UK since 2007 and the very low street quality when sold in heavily adulterated grams.
From：http://www.steroid-hormones.com/Other-steroids/23/
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