Yes, you can thaw a bit and try it. This article can get you some ideas on what can and can't be used: Frog Forum - Basic Frog First Aid. Additionally; most fish meds are safe in the doses prescribed for fish to provide baths. I've used a combo of Melafix and Pimafix (fish meds) in the past; but they are slower acting and not sure will work fast enough in your case.

Still unsure about cause of convulsion. Could be expired CA dust or the water you are using .