The 13W 5%UVB compact is TOTALLY inadequate.
At the very least this needs be upgraded to a 25W UVB200 (10%UVB). The UV source needs to mounted in something like a Exo Terra Compact Top (Nano size) and positioned UNDER the mesh lid and not more than 8 inches from the basking spot for a 25W UVB200.
Give strong consideration to upgrading to a T5HO 12%UVB tube and a good reflector hood about 2/3 the length of the tank (to suit) and mounting this UNDER the mesh lid.
The basking globe will be OK for now even though it's not a good globe , so long as you can get a basking spot at between 95F and 100F with it.
The meds are likely making his tummy feel sick , hence his being out of sorts .