I found some dosage in post 1 of this thread:
https://www.backyardchickens.com/threads/medistatin-nystatin-dose.1211995/
Many give it in food. The scoop that comes with it has 400,000 units of nystatin. The most popular dosage is to give 300,000 units twice a day. Casportpony says that she...
Medistatin powder can be given orally in water with a syringe or mixed in food with a little oil to moisten it to stick to the feed. If they will eat scrambled egg (all of it) it could go in there as well. Do you have a kitchen scale to get a weight? In these directions they give the dosage in...