Welcome to HCM.
Nature knows best how to nourish the siblings. It is just our fear that the breast milk is inadequate. If you feed both
the kids on breast there will be enough milk to properly take care of your kids. Mother's milk in addition contains lot of protective ingredients for the kids, so that they get natural protection against lot of diseases.
Mother's milk is THE BEST for the child.
If you substitute, immediately the quantity of breast milk will decrease.
Never even think of substitution.
No medicines are required to increase the quantity of milk. The sucking action of the kids is the best way to increase milk quantity.