If you wish to stop breast milk production 1.5 years after delivery, it can often be done naturally by gradually reducing breastfeeding or pumping, wearing a supportive bra, and avoiding breast stimulation, which allows milk supply to dry up safely over time. Medicines are usually not needed, but in cases where faster suppression is required, doctors may prescribe drugs like Cabergoline or bromocriptine, which reduce prolactin levels and stop milk production. These should only be taken under medical supervision due to possible side effects like dizziness or low blood pressure. Simple measures like cold compresses and mild pain relievers (if needed) can help with discomfort during this process, and if there is severe pain, swelling, fever, or redness, you should consult a doctor to rule out infection.