Sudden metatarsal pain while using Wellbutrin?

Hi, Salty!
How long have you been taking the bupropion (Wellbutrin)? It could be a potential side effect but they generally resolve within days to a week or two of starting the medication or after a dosage increase.
"Common (1% to 10%): Arthralgia, arthritis, myalgia, neck pain, pain in extremity"
If you've been on the Wellbutrin for a while and this pain came on as sudden onset it may be due to another cause.
I'd say talk to your doctor and get their professional opinion.