Wellbutrin can be one hell of a mean drug, but you will feel better shortly ... heroin withdrawal will set in depending upon your frequency and amont of use - on average, you will be feeling not-so-good in abouty 24 hours, the aches and pains peak at about 48 hours..
In the future please don't be so vauge with your subject line ...
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"I am not one of those weak-spirited, sappy Americans who want to be liked by all the people around them. I don't care if people hate my guts; I assume most of them do. The important question is: 'What are they in a position to do about it?'" (William S. Burroughs)