In previous studies, insomnia was reported as one of the more common side effects of Wellbutrin SR. If you are taking Wellbutrin SR and insomnia becomes a problem, you can try improving your sleep habits by keeping a regular sleep-wake cycle and avoiding caffeine before bedtime, among other things. You should also be sure to talk to your healthcare provider if you develop insomnia while on Wellbutrin SR. He or she may recommend adjusting your Wellbutrin SR dosage or trying a different medication.