Hi, It is normal to feel cold during the withdrawal phase of heroin addiction. Opioid withdrawal can cause several physical symptoms, including chills and goosebumps, which can make the person feel cold. In addition, opioid withdrawal can cause changes in the body s regulation of temperature, which can also contribute to feeling cold. The duration of these symptoms can vary from person to person, but they typically subside within a few days to a couple of weeks after the last use. Regarding her energy levels, it is common for individuals in withdrawal to experience fatigue and low energy. Taking a multivitamin is a good idea, but other things can be done to support her physical recovery. Encouraging her to eat a healthy diet with plenty of fruits, vegetables, and protein can help restore her energy levels. It may also be helpful to encourage her to engage in light exercise, such as taking a walk or doing some gentle yoga, as this can help boost energy levels and promote overall well-being. Withdrawal from heroin addiction can be a challenging and complex process. Your doctor can provide additional recommendations for supporting your daughter s recovery and offer resources for ongoing support. If you require a personalized response, kindly use the Ask A Doctor service and post a follow-up. Take care. Hope I have answered your question. Regards, Dr. Priyanka, General & Family Physician