Modvigil 200 mg is generally safe for healthy adults, but certain individuals should avoid it. People with heart conditions, high blood pressure, liver problems, or a history of mental health disorders like anxiety or psychosis should not take Modvigil 200 without medical supervision. Pregnant or breastfeeding women are also advised to avoid it due to limited safety data. Additionally, those sensitive to stimulants may experience side effects like insomnia, headache, or increased heart rate. Always consult a healthcare provider before using Modvigil 200, especially if you’re on other medications or have underlying health conditions, to ensure safe and effective use.