Which of the following actions is NOT associated with antihypertensives?

Antihypertensives are primarily medications prescribed to lower blood pressure in individuals with hypertension. One of their main actions includes either lowering blood pressure, decreasing heart rate, or helping to correct certain arrhythmias, depending on the specific class of antihypertensive agents used. For instance, beta-blockers not only reduce blood pressure but also decrease heart rate by blocking the effects of adrenaline.

In contrast, the action of reducing fever is typically not associated with antihypertensives. This function is more characteristic of antipyretics, drugs specifically designed to lower fever, such as acetaminophen or ibuprofen. Therefore, the correct answer is that reducing fever is not an action associated with antihypertensive medications.