Why does wellbutrin (bupropion) say to not consume alcohol if there is no drug interaction?

Product Labels: Product labels are designed to ensure that people who use the medication are as safe as possible, also some of the labelling is based on the class of agent rather than on specific information about the medication. So, you will find that the don't consume alcohol warning is on almost every, if not every, psychotropic agent. General experience is that a glass of wine at night is fine.

There is moderate: risk for drug interaction. Per Drugs.Com Drug ineteraction Checker- “Using bupropion with alcohol may increase the risk of uncommon side effects such as seizures, hallucinations, delusions, paranoia, mood and behavioral changes, depression, suicidal thoughts, anxiety, and panic attacks.” There is moderate risk. Ref: https://www.drugs.com/interactions-check.php?drug_list=1034-14582,440-203