How can I give my parakeet antibiotics other than using dropper?

One of my budgies was not acting himself and had green watery diahrea on Friday. I called vet and he took us right in. He examined budgie and said he has slight weeze, dr gave budgie an injection of antibiotics, told us to keep him in a cage by himself, and give him antibiotics twice daily. The dr asked me if I would be able to give him antibiotics using a dropper. I was sure I would be able to so told him yes. I was wrong! Saturday morning when I went to try to grab budgie he flew around cage would not let me grab hold of him. I had to to do the same today I felt really bad that I had to tire him out in order to get him to give him the antibiotics, he squirmed, yelled. I am calling vet tomorrow and asking him if I there are other ways of giving him the antibiotics. Does anyone know how else I can give the budgie antibiotics? Thanks