Final answer:
The primary mechanism of action of antihypertensive drugs in preventing eclampsia involves vasodilation.
Step-by-step explanation:
The primary mechanism of action of antihypertensive drugs in preventing eclampsia involves vasodilation. Antihypertensive drugs such as Amlodipine and Magnesium sulfate work by relaxing and widening blood vessels, which helps to reduce blood pressure. Methotrexate and Metformin are not typically used as antihypertensive drugs.
Antihypertensive drugs are medications used to lower high blood pressure, a condition known as hypertension. There are various classes of antihypertensive drugs, each working through different mechanisms to reduce blood pressure. It's important to note that the choice of medication depends on the individual's specific health condition, and healthcare professionals will determine the most suitable treatment plan.