I appreciate that Depression is miserable to live with; and now that you have made the step to go on medication you are eager to be sure you are on the right dosage. I can understand your uncertainty about whether you are on the correct dosage, because Wellbutrin/bupropion is particularly confusing because it has a number of regarding its number of forms.
If you are on the trade name Wellbutrin you could be on the form that generally is taken 3 times a day; or the SR (sustained release) form which, due to the longer half-life (how long it stays in the body before breaking down by the liver) is taken twice daily; while the XL (extended release), with the longest half-life is taken once a day. Since every medication has side effects, most physicians start their patients on the regular or immediate release to see if they have any negative effects, before increasing the dosage or changing to those with a longer half-life. So I agree with the individual who encouraged you to ask your physician about the dosage if you have a question. I also, in a way, agree with the person who suggested that medications aren't the ideal treatment. Though they do more than cover symptoms--actually helping your brain shift back into functioning like it is supposed to; they way they work is complex and take time (4-8 weeks) before you will see the effects of a particular dosage; and may require a change in the dosage or particular medication before good effect is seen. In general, after it is fully effective, the individual suffering with their first depressive episode should take the medication at the same dosage regularly for 9 to 18 months to give their brain a full chance at recovery. This will minimize the likelihood they will need to take them again later in their lives. In addition, research has shown that the combination of medications and counseling is more effective than either alone in reducing recurrance. Good luck - and hang in there valerie