Benjamin franklin says calls this recipe medicine for the “Supression of Courses”
Courses is absolutely a very old term for... menstruation
https://thisisversaillesmadame.blogspot.com/2018/07/courses-terms-flows-menstruation-in.html
However the recipe does include pennyroyal tea, which is an abortificient
Married women would not have taken it because you do take it before menstruation starts and they could be pregnant. They would not want to kill their babies.
However for unmarried women, who are not having sex and so are in no danger of being pregnant, it is quite safe.