A client comes to the clinic and reports general sadness, exhaustion, and a loss of interest in activities. The client is interested in taking St. John's wort. Which medications, currently prescribed to the client, cause the nurse to be concerned? (Select all that apply.)
a. Hydrochlorothiazide.
b.Digoxin.
c. Nifedipine.
d. Simvastatin.
e. Escitalopram.
f. Metformin.