Final answer:
A pertinent negative when taking a history from a patient complaining of chest pain would be the absence of breathing difficulty. Other pertinent negatives include the lack of a history of allergies, the patient's taking nitroglycerin and ASA, and the lack of prior heart attacks.
Step-by-step explanation:
A pertinent negative when taking a history from a patient complaining of chest pain would be the absence of breathing difficulty. This means that the patient does not experience any difficulty in breathing, which can be a sign of a serious condition. Other pertinent negatives would include the lack of a history of allergies, the patient's taking nitroglycerin and ASA, and the lack of prior heart attacks.