Hi Susan, I'm so sorry to hear that he's coughing, it sounds like he has an upper respiratory infection and needs to see the Reptile Vet to have a culture done to determine what the cause is and the correct medication to kill the microbe causing it. Dragons get both bacterial and fungal upper respiratory infections, so it's important to not just allow the vet to put him on a broad-spectrum antibiotic, like Baytril (usually), without insisting that he do a proper culture to be sent out to determine the correct medication, because if it's caused by a fungi then the broad-spectrum antibiotic will do no good. So please be sure to force the issue of a culture when you do get to the vet.
Do not give him any prescription antibiotics, like the amoxicillin. It's likely not the correct antibiotic to help whatever bug he has anyway, but you could also make him very sick or possibly really hurt him because you have no way of controlling the dosage you're giving him. Thanks i have upped his temps a little and i will make his basking spot slanted..I pray he will be ok
Until you can get him to a Reptile Vet on Monday, bump of the temperatures inside his tank by 5-10 degrees by lowering his basking bulb down towards his tank or adding a second, very low wattage bright white bulb over his tank. Also, set up his basking spot on a downward ramp, you can use a flat wood board propped up on his basking rock, and put him on it so that his head is facing down the ramp. Try to keep him on this in that direction as much as you can, this will help to drain the excess mucous and fluids out of his chest and his head. That combined with the extra heat should be enough to keep him comfortable until Monday. You should also offer him water drops on the tip of his snout, allowing them to run down over his lips, hopefully he'll lick them off. Do this several times throughout the day so he'll stay
hydrated.