When discussing Xanax overnight, it's important to clarify the context. If you're referring to obtaining Xanax overnight, it typically involves either having a prescription filled urgently or seeking immediate medical attention for anxiety or panic symptoms. Here's some detailed information on both scenarios. Obtaining or using Xanax overnight should be done under the guidance of a healthcare provider. Whether you need an urgent prescription filled or are managing symptoms at night, it's crucial to follow medical advice and use the medication safely. If you have any concerns or questions, always consult with your healthcare provider.