Is it necessary to take wellbutrin (bupropion) sr twice a day?

Wellbutrin (bupropion) SR. Wellbutrin (bupropion) sr is usually started at 150 mg once in the morning for 3 days and then increased to twice a day (2nd dose before 2pm to avoid possible insomnia). If used for mood, once a day may suffice based on certain studies. If used for nicotine dependence, 2x/day has shown to be much more efficacious. Please follow your doctor's order or discuss options with him/her before making adjustments.
Wellbutrin-SR. It is usually prescribed as one in morning & one at lunch. The other form (Wellbutrin-XL) is once a day.