What action should be taken if a patient's blood pressure falls below 90 mmHg while on a GTN patch?

Removing the GTN patch is the appropriate action if the patient's blood pressure falls below 90 mmHg. GTN (glyceryl trinitrate) is a vasodilator used to relieve chest pain and manage conditions like angina; however, it can lead to hypotension as a side effect, especially if the blood pressure drops too low.

When blood pressure falls below this threshold, it indicates that the patient may be experiencing adverse effects from the medication, which can potentially lead to further complications or a decreased ability to maintain adequate perfusion. By removing the patch, the immediate influence of the medication on the vascular system is alleviated, helping to stabilize the patient's blood pressure.

Maintaining careful monitoring of the patient's condition after removing the patch is also essential. Depending on the situation, further interventions can be determined. Doubling the dose of GTN or administering a second medication would not be appropriate, as these actions would further lower blood pressure. Increasing fluid intake may not address the underlying issue and should not replace the need for immediate corrective action when hypotension occurs.