In your clinical experience, have you noticed that brand-name Propecia/Proscar are more effective than generic finasteride?

I would recommend starting with the brand name for proven efficacy and then switching to generic after about 6 months for maintenance. If you notice any drop off in effect then go back to the brand name. Do not be lured by some of the responses below to buy unnecessary products. 

ive taken generic for 10 years without Issues, and most of my patients have no complaints either way. I do suggest you do PRP/acell every 3-4 months for sure, topical growth factors and roller, and topical restorsea (see link)
I suggest a formal consultation as there are a combination of treatments that can be done to improve har loss.  Oral finesteride has very little to no side effects in the majority of people; PRP/platelet-rich plasma + stem cells like A Cell help regrow hair and slow down the thinning process; rogaine and restorsea spray should be used daily; oral viviscal helps keep nutrients high in the follices as well.  Transplantation is a last resort but works early in the aging process as well.  A formal consultation and combination treatment is needed.  Best, Dr. Emer. 

In my opinion, generic and brand name propecia produce similar responses. If you're not satisfied, consider using dutasteride.Jeff Rapaport MD FAADRealself Verified All-star

Some of my patients who have taken the Brand name Propecia found that when they switched to the generic, they lost hair suggesting that the generic as not as good as the brand named drugs