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cross reaction cocaine/proparacaine

I know that cocaine is a natural anesthetic and also that proparacine is a syntetjc one, I just wnat to know if is possible to have a cross reaction for drogs screening if it was a patient who just have an eye exam ## Quisiera conversar directamente con Yajaira Torrealba. Soy de La Caro-1973. ## NO HABLA ESPANOL! ## I am allergic to codeine - is hydrocodone a derivative of codeine or contain codeine - I was prescribed hydrocodone for severe back pain ## Yajaira Torrealba you are of Venezuela

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