Complex sentence: Now off-patent, it is available over the counter for treatment of androgenic alopecia, among other baldness treatments, but measurable changes, if experienced, disappear within months after discontinuation of treatment.
Split into simpler sentences: Now off-patent, it is available over the counter for treatment of androgenic alopecia, among other baldness treatments. However, measurable changes, if experienced, disappear within months after discontinuation of treatment.