It is generally safe to stop an antidepressant 8 days after starting it, but it is important to consult with your doctor or pharmacist before making any changes to your medication regimen. Some medications can cause mild anxiety or sleep disturbances when first starting them, but these side effects usually improve with time. If you experience any severe or intolerable side effects, it is recommended to seek medical advice. It is unlikely for withdrawal symptoms to occur after only 8 days of taking the medication, but if they do occur, they should subside within a few days. It is always best to follow the guidance of your healthcare provider when making decisions about your medication.