Taking two Artvigil 150 mg tablets (totaling 300 mg) at once is generally higher than the recommended dose and may not be safe. buy Artvigil 150 (armodafinil) it is typically prescribed at doses of 150 to 250 mg per day for conditions like narcolepsy or sleep apnea. Exceeding this dosage could increase the likelihood of side effects such as headache, nausea, anxiety, elevated heart rate, and insomnia. It is essential to follow your doctor\u2019s dosage recommendations and consult them before taking more than prescribed. If you find the current dose insufficient, discuss your concerns with your healthcare provider to adjust your treatment safely.