So glad she is feeling better. When she comes home it will be really important to get the meds into her as directed, have the vet show you how when you go to pick her up.
The method I use is as follows: I give the meds in the morning while it is still fairly dark and the birds have not yet begun to be active because the room is still dark and they are still covered. You have to have a nightlight or something so you can see a bit what you are doing, let your eyes adjust to the darkness of the room before beginning. Make sure you know where he is sitting in the cage , if there are other birds in the cage this may be a bit more difficult. Very slowly and quietly open the cage door reach in and gently cup your hands around him and remove him from the cage, do not grab with one hand if at all possible, this may be more difficult if the cage has only a small door, sit down and place him on a table, during all this time I find that it is best to use only the amount of restraint with your hands necessary to keep him from flying off, the more gentle you are the less he will fight and squirm around. Once you are sitting administer the meds into the mouth and return him immediately to the cage and keep the lights off and let him relax. This may work out better if he is comfortable sleeping in a cage by himself because when you put your hand in the cage to remove him you will not be spooking the other birds, once that happens you need to back off and try again later, the last thing you want is to try to catch him when all the birds are in a frenzy. My birds are not hand tame and I have used this method hundreds of times, make sure you have the meds ready in the syringe before you begin and stay calm. If the meds have to be given twice a day I do the same thing at night, I put them to bed and then repeat the above actions after tings have been quiet for about 30 minutes.