Some users report having severe depression or thoughts of depression while using Phenytek. These feelings should be reported to your personal doctor as well as the following serious side effects: swollen glands, abnormal bleeding or bruising, tender gums, any skin rashes, hallucinations, strange thoughts, loss of coordination, speech impairment, tremors, increased or darkened urination, jaundice, restless facial movements, confusion, severe thirst or hunger, loss of appetite, or a change in the patient's lips or face. Other milder side effects include itching, dizziness, insomnia, vomiting, headaches, nausea, nervousness, constipation, or pain in the joints. Asian patients are at a higher risk of severe skin reactions. This condition is rare and will need medical attention.