Is there such a thing as a "shedding phase" after starting Propecia?

Although there are reports of Propecia causing an initial "shedding" phase, this is not something that I have seen in my patients. In some patients, Propecia may not affect the overall hair loss trajectory, and this could explain the shedding phenomenon (they simply lost hair that would have fallen out even without Propecia). In other patients, Propecia can be highly effective at stopping hair loss or even increasing hair mass over time. Patients should generally be encouraged to give Propecia a trial for a full 12 months (as long as they are not experiencing any side effects) before giving up. 2-3 months is simply not enough time to see a noticeable effect. Hair transplantation is also a great option for many patients in addition to Propecia. As always, a consultation with a fellowship-trained hair restoration surgeon is recommended in order to obtain an individualized treatment plan.Best,

There shouldn't be shedding with Propecia but you may read about it on line.  I personally have never seen patients complaint of this.  In the end, you have to weigh out the risks and benefits.

Any treatment that stimulates hair growth, whether minoxidil, finasteride, low level laser or platelet rich plasma can cause an initial shed. Shedding with finasteride (Propecia) can occur in the first 4-12 weeks and generally resolves.