No, Tazowin 1 ml Injection is not used for depression. It contains Pentazocine 30 mg, which is an opioid or narcotic analgesic used to relieve moderate to severe pain. It does not help with depression and should be taken only under a doctor’s supervision because it can cause drowsiness, dizziness, and dependence if misused. If you have symptoms of depression, you should consult a doctor for proper treatment.