A nurse is caring for a client who has thrombophlebitis and is receiving heparin by continuous IV infusion. The client asks the nurse how long it will take for the heparin to dissolve the clot. Which of the following responses should the nurse give?

"The oral medication you will take after this IV will dissolve the clot."

"A pharmacist is the person to answer that question."

"It usually takes heparin at least 2 to 3 days to reach a therapeutic blood level."

"Heparin does not dissolve clots. It stops new clots from forming."