I have been taking the increased dosage for one week.
It make take anywhere from a few days to a few weeks. I was on Wellbutrin SR 100 and it barely made a difference for me, so I switched to Wellbutrin XL 150 and I felt the difference within 7-10 days. When I have switched between XL 150 and 300, I always feel the difference within a few days. SR might take longer.
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