This is why this should be done
with an experienced psychiatrist and not a general doc, and even
with a psychiatrist, one needs to question the person to make sure they know what they're doing. Some homework is also advisable -- all this info is probably on the website of the company making both drugs and on the info given with each prescription. Then, when you do start a new med, it's generally tapered up slowly, not just starting with 40mg.