Drained,
You can’t have recovery if you won’t acknowledge a problem exists.
If he’s not acknowledging his drug use was a problem to himself and those around him, then what does he think he is seeing a therapist for?
It sounds like he is gas lighting, attending therapy for the marriage but is sitting in blame towards you. His wheels are going to just keep spinning and spinning, it would appear he’s doing nothing more then wasting time and money in therapy.
If what he ordered from India was in fact cream then he would be able to show you this cream to alleviate and doubt and put you at ease but he’s not done that. It would appear he’s exchanged one drug of choice for another.
How are you doing with your codependency issues and your own recovery program?