Final answer:
IV Morphine sulfate is the preferred drug to control pain for patients with an MI because it provides rapid pain relief and also helps in lowering blood pressure, which is beneficial during an MI.
Step-by-step explanation:
The drug of choice to control pain in patients who have had a Myocardial Infarction (MI) is IV Morphine sulfate. Morphine is an opioid that not only alleviates severe pain but also has the beneficial effect of lowering blood pressure which can be elevated during an MI. It is preferred over oral oxycodone because of its ability to provide rapid pain relief and its hemodynamic effects. Sublingual nitroglycerine is used to relieve chest pain by vasodilating the coronary arteries but is not primarily a painkiller. Angiotensin-converting enzyme (ACE) inhibitors are used in the longer-term management of heart failure and prevention of recurrent MIs, but not specifically for pain control after an MI.