Hello, My Son (21) Started Zoloft About 3 Weeks Ago

Hello, my son (21) started Zoloft about 3 weeks ago to replace taking Wellbutrin. ( He took Wellbutrin for anxiety/OCD and mild depression). The Zoloft has had o
Wonderful effects much better than the Wellbutrin, but he says the headaches are daily and very severe. He described the headache as “ pounding”. What alternatives are there to Zoloft? Thank you, Kim