It was more troublesome smearing magic medicine on weapons than doing so with poison. Magic medicine had a higher level of volatility, and only a mage would be able to ensure that the magic medicine on a weapon could last for an extended duration. Even if a soldier possessed magic medicine, the magic medicine would be useless.
Chaotic medicine was used to deal with summoning spells, but it also had the same effect on puppets. Even if a puppet was not controlled by a mage, it would still need a set of operational rules to distribute its energy so that it could battle autonomously. The moment a puppet was damaged by chaotic medicine, it would lose control over its movements. Not only would it attack its enemies, but it would also attack its own companions.
This kind of medicine was the forte of a death mage. If an elemental mage tried producing it, it would be as difficult as producing high-grade medicine.