While you take a Modalert 200 mg tablet, your doctor may advise you to have an electrocardiogram (ECG). Your heart rate, blood pressure, and other vital signs will be tracked in addition to a 200 mg dose of modafinil. If you recently had a heart attack, arrhythmias (irregular heartbeats), uncontrolled or moderate-to-high blood pressure, or any of these conditions, you shouldn't take modafinil...