The nurse cares for a female client who has received intravenous heparin and antibiotics for one week. The nurse notes that the client has developed a petechial rash across the chest and abdomen. What should the nurse do first?

Rationale: A. Holding the antibiotic is not the first action. While certain antibiotics can contribute to thrombocytopenia, withholding the medication without confirmation is premature. The priority is to assess the cause of the petechiae before making medication changes. B. Notifying the health care provider immediately is important but is not the very first step. The nurse should first gather objective data, such as the platelet count, to provide accurate information to the provider and guide timely interventions. C. Monitoring to see if the rash spreads is unsafe as the initial action. Petechiae may indicate thrombocytopenia, potentially from heparin-induced thrombocytopenia (HIT) or another drug-related cause. Delaying assessment could put the client at risk for bleeding or other complications. D. Checking the platelet level is the first and most appropriate action. The development of a petechial rash in a client receiving heparin raises immediate concern for thrombocytopenia. Obtaining the platelet count allows the nurse to confirm the severity, assess for heparin-induced thrombocytopenia or other causes, and prioritize interventions to prevent bleeding complications.