Oggy I am just going to paste you a post that I made for someone awhile ago who asked the same question. It's very long but informative:
"If you want to start finasteride,
You have a choice of Propecia or Proscar. Propecia is the 1 mg form prescribed for hair loss, and Proscar is the 5 mg form typically prescribed for benign prostatic hyperplasia.
Propecia you can just take 1 mg a day of, and Proscar you can cut into either 4 or 5 pieces, so you'll be taking either 1.25 mg a day or 1 mg a day. There's virtually no difference in effectiveness between 1.25 mg a day and 1 mg a day.
Now as for where to get it, you have a few options for where to get it. You can get your dermatologist to prescribe Propecia for you, but that's expensive. It will run you upwards of $700 a year. Or you could ask your dermatologist to prescribe you Proscar to save you money, and you can cut the pills yourself with a pill cutter into 4 or 5 pieces. That will run you around $270 a year. There is a generic Proscar available in the United States right now for around $230 a year. No generic Propecia available yet in United States pharmacies that I know of.
If you don't want to go the doctor route, then there are TWO reputable pharmacies online that I know of that don't require prescriptions.
These sites, in addition to carrying brand name Propecia and Proscar, also carry cheaper generics made in places like India that are just as effective.
Here are the two pharmacies that have been found to be reputable by people on this forum and others:
http://www.inhousepharmacy.com
http://www.unitedpharmacies.com
If you want branded Propecia(1 mg), you can get it at these links:
http://www.unitedpharmacies.com/Propeci ... s_p_8.html
http://www.inhousepharmacy.com/hair-loss/propecia.html
If you want branded Proscar(5 mg), you can get it at these links:
http://www.unitedpharmacies.com/Proscar ... s_p_9.html
http://www.inhousepharmacy.com/hair-loss/proscar.html
If you are willing to try an Indian generic of Propecia(1 mg) which will save you a ton of money, here is a good one available at both sites. It's called Finpecia:
http://www.unitedpharmacies.com/Finpeci ... p_343.html
http://www.inhousepharmacy.com/hair-loss/finpecia.html
If you want to try an Indian generic of Proscar(5 mg) and save you even more money than the generic Propecia, because you will be cutting the pills yourselves with a pill cutter, go to one of these links:
http://www.unitedpharmacies.com/Fincar_ ... p_346.html
http://www.inhousepharmacy.com/hair-loss/fincar.html
Here are some estimates for prices:
A year's supply of branded Propecia will run you a bit over $700. A year's supply of branded Proscar will run you about $270 from a US pharmacy with a doctor's prescription. A year's supply of generic Proscar from a US pharmacy will run you about $230. That takes care of the various versions of finasteride available from US pharmacies.
As for online,
You can get a year's supply of branded Propecia for a bit over $700 as well. You can get generic Proscar somewhere in the $200s at the two sites.
You can get generic Propecia(Finpecia) for around $150 a year from United Pharmacies including shipping. You can get generic Proscar(Fincar) for around $80 a year from United Pharmacies including shipping.
So it comes down to your budget. If money isn't an issue then you can go to your Doctor, get a prescription, and get some US Propecia. Or you can use one of the sites above and save up to 80% on your finasteride.
And keep using the nizoral while you're on finasteride.
Hope this helped."