confusion between Wellbutrin SR and the new Wellbutrin XL

There will be confusion between Wellbutrin SR and the new Wellbutrin XL.

Both forms of bupropion are expected to have similar efficacy for treating depression.

The big difference is that Wellbutrin XL is given ONCE a day instead of BID. For example, Wellbutrin XL 300 mg/day is equivalent to Wellbutrin SR 150 mg BID.

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