Hormone levels check up before and during finasteride use

If you want your hormones levels checked please see a doctor for recommendations.  Propecia affects DHT hormone levels.

In my opinion , there exists controversy as to whether people with low DHT will benefit from Propecia or Avodart.  Presently, there are no studies on this hypothesis....Furthermore, it's  important to realize that DHT blockers will lower the PSA level approximately 50%. For this reason we like to get a pretreatment PSA level and a post-treatment PSA level as well as check intermittently in people with a family history of prostate cancer.Hope this helps.

I will answer this question assuming you are male. I have written on this subject and my writing is referenced below in the Web Reference.  Read the many writings on this subject, as it discusses DHT level measurements with regard to the use of drugs like finasteride as well as side effects of drugs