There are concerns about the use of Vyvanse during breastfeeding as it may decrease milk production and the effects on the baby's neurological development are not well known. It is generally avoided. An alternative medication such as methylphenidate (Ritalin) may be considered in certain cases but would require careful monitoring for side effects. Immediate-release formulations are recommended over delayed-release ones to minimize exposure to the baby. The lowest effective dose should be used. Ultimately, the decision to treat ADHD during breastfeeding should be made in consultation with a healthcare provider, taking into account factors such as symptoms, risk factors, the baby's age, and feeding frequency.