Naltrexone is prescribed primarily for addiction issues.
It blocks the effects of opioids, alcohol etc.
If you are using low dose sedative to manage your anxiety from your Covid symptoms, Naltrexone will cancel that effect. I know most are very negative to sedative because of it’s addictive nature, however antidepressants are also addictive and hard to finally discontinue. I don’t really see the difference. Very low dose Klonopin has helped me. For this reason I cannot give Naltrexone a try.