A nurse is reviewing the medical records of four clients. The nurse should identify that which of the following client findings requires follow-up care?

A client who is scheduled for a colonoscopy and is taking sodium phosphate

A client who is taking bumetanide and reports an increase in urinary frequency

A client who received a Mantoux test 48 hr ago and has an induration

A client who is taking warfarin and has started to breastfeed