It is impossible for your healthcare provider to know whether you will develop insomnia while taking Wellbutrin XL. Also, in some cases, if a person does develop insomnia, it is difficult to know whether these problems are because of the condition or because of Wellbutrin XL. This is because insomnia is common with depression and seasonal affective disorder.
If you develop insomnia while taking Wellbutrin XL, talk with your healthcare provider. He or she may be able to recommend treatment options, including adjusting the Wellbutrin XL dosage or trying another depression medicine.