When Artvigil 150 mg Pills is taken excessively, the following side effects may occur: headache, difficulty sleeping, nausea, dry mouth, drowsiness, nervousness, and fatigue. Unfriendly effects, such as depression, thoughts of self-destruction, hallucinations, irregular heartbeat, chest pain, and severe hypersensitivity reactions, may occur in a few rare instances. In the unlikely event that any of these adverse effects worsen or persist for a long time, consult your PCP right away.