I am taking Venlafaxine since over 30 years, yes starting with this medication or trying to quit does a few side effects I experienced like Dizziness and vertigo also but only for a few days. It’s important to stay close in communication with your doctor if side effects don’t disappear.
For me it is a life saver, handling my depression.
I have no side effects otherwise.
Do yourself a favor and get a second opinion with your symptoms to be sure this Medication is the right one in your case.
Good luck and keep us updated.