If a client has taken three sublingual nitroglycerin tablets but still experiences chest pain, what should they do next?

If a client has taken three sublingual nitroglycerin tablets and continues to experience chest pain, the most appropriate action is to call for emergency help. This situation is indicative of a potentially serious condition, such as a myocardial infarction (heart attack) or persistent angina, where the heart is not receiving enough oxygen.

Taking a fourth tablet without assessment could lead to excessive hypotension (low blood pressure) and other complications, as nitroglycerin can cause vascular dilation and lower blood pressure. Waiting at home or visiting a clinic may not provide the immediate medical intervention required in such emergencies.

Calling emergency services ensures that medical professionals can arrive quickly to evaluate the patient's situation and provide necessary treatment, potentially lifesaving measures if a heart attack is occurring. It is vital to seek emergency assistance when symptoms persist despite the use of nitroglycerin, as this can indicate a more serious cardiac event.