It caused me to retain water, which made my legs feel heavy and swollen and left me constantly worried about whether I would be able to prevent dehydration (or hyponatremia) during rides. It also made me gain weight, caused frequent migraines and generally turned me into an angry *****. And this was a low-level dose that I took to fix a problem with too-frequent periods. After 4 months I stopped taking it and it was several months after that before the migraines subsided.

Your mileage may vary...