Thank you for this interesting question. In general, when making recommendations on medications and supplements, it is necessary for a physician to review your entire medical history as well as a list of all your medications and supplements. Therefore, I recommend you schedule an appointment with a primary care physician
to determine the safety of these supplements for you.
Vitamins and herbal supplements have come under increased scrutiny of late. They are not subject to the same scrutiny as medications by the FDA. As such, manufacturers can make any claims they see fit about a supplement without any data to support these claims. Several studies have shown that supplements often contain other substances than they claim and often contain no amount of the advertised supplement. Because of this, the valerian and skullcap extracts could contain supplements that have life-threatening interactions with bupropion, and you would have no way of knowing this in advance. In addition, there are many high profile cases where supplements have led to death, often through liver toxicity. In these unfortunate cases, it took quite some time before these supplements were removed from the market. As such, I cannot say that these supplements are safe for you. You will need to discuss your specific case with a primary care physician.