A client received an order for acetaminophen 400 mg PRN for…

A client received an order for acetaminophen 400 mg PRN for pain at 1200. The max dose in a 24 hour period is 1600 mg. The client receives doses at 1200, 1800, 2300, and 0400. The time is now 1600 and the client is requesting another dose. Is it safe for the nurse to administer this dose?