For those with certain medical issues, Modalert 200 (modafinil) should not be used. Modalert may raise blood pressure and heart rate, therefore prior to taking it, anyone with a history of cardiac issues, such as arrhythmias or hypertension, should speak with a doctor. Due to the drug's hepatic metabolism, anyone with severe liver or renal illness should also avoid it. https://www.smartfinil.net/product/modalert-200/