Is it permissible to take medicine that contains deer antler powder?

If the horn powder is pure, being taken from an animal slaughtered according to Islamic law, and the medicine is medically licensed, then there is no harm in consuming it, as it is permissible to eat anything pure that causes no harm. If the medicine is licensed, this indicates that the powder is not harmful. However, if the horn was taken from a carcass or cut from a living animal, scholars have differed regarding its purity. The opinion that it is pure is strong, and there is no harm in adopting it.