Final answer:
The nurse recording the client's pain level after pain medications were given is a part of the evaluation phase in the nursing process.
Step-by-step explanation:
The part of the nursing process that would involve recording the client's pain level after pain medications were given is called the evaluation phase.
In the nursing process, evaluation is the phase where the nurse assesses the client's response to interventions and determines whether the desired outcomes have been achieved.
In this case, recording the client's pain level after pain medications were given helps the nurse evaluate the effectiveness of the medication and whether it has achieved the desired outcome of reducing the client's pain.