If this is the drug that Valieva takes,
https://rupharma.com/hypoxen/#product-additional-info , this is something that would never be sold over the counter in the US. It is not recognized by the FDA, nor can it be found via the National Library of Medicine application. However, it is primarily used in the study below, as an adjunct treatment of congestive heart failure.
Then overlay TMZ, then she is taking a potentially powerful cocktail whose interactions with Hypoxene are unknown. There's no way an elite athlete has that condition. This gets more shocking by the minute. I've attached the findings from The National Library of Medicine as to the clinical trials done for TMZ and some of the studies suggest some pretty detrimental impacts.
clinicaltrials.gov
The NLM Technical Bulletin is your source to stay informed about NLM products and services.
druginfo.nlm.nih.gov