Valproic acid was first synthesized in 1882 by Beverly S. Burton as an analogue of valeric acid , found naturally in valerian .  Valproic acid is a carboxylic acid , a clear liquid at room temperature. For many decades, its only use was in laboratories as a "metabolically inert" solvent for organic compounds. In 1962, the French researcher Pierre Eymard serendipitously discovered the anticonvulsant properties of valproic acid while using it as a vehicle for a number of other compounds that were being screened for antiseizure activity. He found it prevented pentylenetetrazol -induced convulsions in laboratory rats .  It was approved as an antiepileptic drug in 1967 in France and has become the most widely prescribed antiepileptic drug worldwide.  Valproic acid has also been used for migraine prophylaxis and bipolar disorder. 
Superdrol is a decent anabolic steroid, but we would not call it superior or even “Super” as its marketing campaign once implied. What truly makes this steroid special was a group of men who recognized a hole in the steroid law and were able to capitalize on it, and in turn, make a nice profit. Due to the marketing and ease of purchase that existed for a long time, many athletes fell in love with this steroid, and it is a fine steroid, but there’s nothing magical or superior going on. Superdrol is a very basic anabolic steroid.
Dutasteride was patented in 1996  and was first described in the scientific literature in 1997.  It was approved by the FDA for the treatment of BPH in November 2001 and was introduced into the . market the following year under the brand name Avodart.  Dutasteride has subsequently been introduced in many other countries as well, including throughout Europe and South America .  The patent protection of dutasteride expired in November 2015 and the drug has since become available in the . in a variety of low-cost generic formulations .