Using this potion on a creature will change its gender to male/female. Users beware, most creatures do not appreciate having such a change forced upon them.
Gender change potions can only be given to adult creatures. It will change the gender of the creature to its opposite. Despite the warning in the description, there are no averse effects to using the potion.
The high price of the potions was set very deliberately to prevent over-usage. The warning in the description is also to deter from this. The preferred (and much cheaper) method of deciding a creature's gender, is by using a Nest.
On the inventory page, the potions are listed as 'Gender' items, a trait they share with the Nests. They can be considered potions, however,