The client is being treated with a thiazide diuretic. He tells the nurse that he is interested in ...

The client is being treated with a thiazide diuretic. He tells the nurse that he is interested in using herbal preparations and frequently self-medicates with ginkgo. The nurse's most appropriate response to this information is:
 
  a. Ginkgo can be effectively used with a thiazide diuretic since it decreases blood pressure.
  b. Ginkgo can be used with a thiazide diuretic since it prolongs medication's action.
  c. Ginkgo should not be used with a thiazide diuretic since it increases blood pressure.
  d. Ginkgo should not be used with a thiazide diuretic since it may cause toxicity.