Dizziness and insomnia on virus-blocking drugs (such as tenofovir) are most likely due to side effects of the drugs, overdose, and so on. 1. Drug side effects: Virus-blocking drugs are generally drugs that stop viral replication, such as tenofovir, emtricitabine, raltegravir, zidovudine and so on. Adverse reactions after taking this type of drug include dizziness and headache, depression, insomnia, vomiting, abdominal pain and so on. Some patients will also cause a decrease in hemoglobin and other conditions, causing anemia, patients will also have dizziness, insomnia symptoms. 2. Overdose: If patients take too much medication, it will cause drug toxicity reactions, such as severe nausea, vomiting, dizziness, headache, insomnia, abdominal pain, etc., more to take medication must be under the guidance of a doctor, to avoid toxic adverse reactions. In addition to the above reasons, it may also be caused by reasons other than drugs (such as patients with anemia, insufficient blood and oxygen supply to the brain) and other reasons. If the above symptoms occur, it is recommended to go to the hospital for early treatment. All the above medications should be used under the guidance of a doctor, avoid self-medication.