When starting a new medication, particularly for hair loss treatment, the regrowth of hairs that have shed can vary depending on the individual and the medication being used. In some cases, it may take several months, and it's not uncommon for regrowth to take six months or even longer.
Hair growth is a slow process, and it goes through different phases, including the resting phase (telogen) where shedding occurs and the growth phase (anagen) where new hair starts to grow. The timeline for regrowth can be influenced by factors such as the underlying cause of hair loss, the specific medication used, the individual's response to the medication, and their overall health.