Can I repeat PRP in 15 days?

PRP treatment is applied at 4-6 week intervals and are made for 4-6 sessions in total. Of course it changes for patients situation. Doctor,s advice is really important in this.

Unfortunately,at present there is no standardized clinical protocol as to the time interval between PRP sessions.Most experienced Hair surgeons feel that it should be done every month to 3 months for the first year of treatment.There is no harm in doing another treatment in 15 days,it's just unclear whether or not you will benefit.

There is no absolute protocol. Some doctors recommend one injection and others recommend up to 5. I generally recommend 3 injections 6 weeks apart with a booster every 6 months. I see no rationale basis for having a treatment 3 weeks apart, although it will certainly do no harm.  If it makes you feel better, it's your call.

Optimal results have been seen with sessions 4- 6 weeks apart. This is the ideal time for the growth factors to have their effects. Dr. L Manrique

I recommend treatments 4-6 weeks apart, however it is really up to your provider. I don't think it would cause any harm if you had another treatment, but I would consult with your provider.

Each to their own, studies have shown that prolonging the injections of PRP for 4-10 weeks will be optimal. All the best, Dr Davin S. Lim. Laser and aesthetic dermatologist, Brisbane. Australia.