Your patient is being treated for depression and is started on a regimen of fluoxetine (Prozac). She calls you 10 days after the drug therapy has started to report that nothing has changed and she wants to try a different drug. You should 

a. Tell her to try sertraline (Zoloft) because some patients respond to one SSRI and not another. 

b. Ask her to try a few days without the drug to see whether there is any difference. 

c. Add an MAOI to her drug regimen to get an increased antidepressant effect. 

d. Encourage her to keep taking the drug as prescribed because it usually takes up to 4 weeks to see the full antidepressant effect.