Detox typically takes 5-10 days for most substances, though it can extend to 2-3 weeks depending on what you’ve been using and your individual situation. The first few days are usually the hardest—you’ll likely experience anxiety, body aches, insomnia, and strong cravings, but medical staff can manage these with medications and support to make it more bearable. By day 5-7, most people start feeling physically better, and that’s when the mental work of rehab begins. Being nervous is completely normal, but you’re taking the right step by reaching out and preparing yourself.