Tretsol solution is just a brand name for a product containing retinol. There are various prescription products contain medical concentrations of retinol, all of which are really excellent products, giving brilliant results. The specific product and concentration you would need would depend on the severity of your blemishes and it would also depend on the cause of your blemishes. Before you would be able to get this product from anywhere you would need a Doctor’s analysis and prescription for it to be safely used and for you to get the best results.