With Finasteride it can ruin your life in other ways, like causing debilitating physical and emotional symptoms that may not resolve after stopping the medicine. Finasteride can really cause permanent receptor damage to your brain to where hormonal treatments are ineffective.
Finasteride causes HPTA dysfunction and the men with double or triple the normal testosterone seem to be the most affected by Finasteride. There is always topical Finasteride which Empower Pharmacy compounds and there is no indication it causes problems associated with oral Finasteride.
TSH is not normal and is a problem, you have hypothyroidism and need to check actual thyroid hormones to determine if it’s hashimoto’s thyroiditis disease which is the most common. Finasteride is most likely the cause of thyroid dysfunction. You need a thyroid panel checking TSH, Free T4, Free T3, Reverse T3 and antibodies.
It wouldn’t hurt to have a iron panel done, iron deficiency can cause thyroid problems and vice versa. A lot of HMO doctors/providers usually test T3 which is a mistake and is only good at diagnosing hyperthyroidism, not hypothyroidism.
Reference ranges for TSH and thyroid hormones
Though TSH remains the most commonly used endocrine test in clinical practice, the issue of an appropriate TSH, and to a lesser extent, free T4 and free T3 reference ranges is still under debate. First of all the distribution of TSH reference range is not normal, with median values (also depending on population iodine intake) usually between 1-1.5 mU/L.
The evidence for a narrower thyrotropin reference range
It has become clear that previously accepted reference ranges are no longer valid as a result of both the development of more highly sensitive TSH assays and the appreciation that reference populations previously considered normal were contaminated with individuals with various degrees of thyroid dysfunction that served to increase mean TSH levels for the group.
Recent laboratory guidelines from the National Academy of Clinical Biochemistry indicate that more than 95% of normal individuals have TSH levels below 2.5 mU/liter. The remainder with higher values are outliers, most of whom are likely to have underlying Hashimoto thyroiditis or other causes of elevated TSH. Importantly, data indicating that African-Americans with very low incidence of Hashimoto thyroiditis have a mean TSH level of 1.18 mU/liter strongly suggest that this value is the true normal mean for a normal population.