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51 bytes added ,  10:01, 3 September 2009
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===Procaine===
 
===Procaine===
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Procaine is ester-linked, and so may cause allergic reactions to the PABA metabolite. It has a short duration of action and may be added to penicillin to reduce pain on injection.
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Procaine is ester-linked, and so may cause allergic reactions to the PABA metabolite. It has an onset of action of 15-20 minutes and a duration of action of 45-60 minutes and may be added to penicillin to reduce pain on injection.
    
===Proxymetacaine===
 
===Proxymetacaine===
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