What medication are you administering?
Vitamins, and electrolytes I may do that, but with medication where you want a specific dose, it's best to directly administer it into their mouth, as by just dripping it along there beak, there's a decent chance a good portion of the medicine will fall out of their mouth.
Administering into their mouth is not as hard as it looks. For the birds here, I grab them, wrap them in a towel if needed to prevent wing flapping, and either pull down their wattles or pinch the corners of their mouth which will get them to open their beak. Insert the syringe (1ml works best), into the right side of their mouth, and slowly pull the plunger. After the medication is out, pull the syringe out, and let them get everything down themselves.
Here is a good link on administering medications to poultry :
View attachment 2389315
Avoid the hole in the middle, as that is the trachea.
https://www.backyardchickens.com/ar...dications-to-all-poultry-and-waterfowl.73335/