It's actually not true that Tazorac is the most effective for wrinkles and sun damage.  The studies done showed a slightly faster onset of improvement but there is no difference long term.  To me this is a good example of confusing science and scientific reporting.  With the topical retinoids (tretinoin, Retin A, Renova, Tazorac, etc) that are used over many years and are known to help with cosmetic issues and prevent skin cancers and percancerous growths, who cares if the onset of improvement is 4-6 weeks faster?   It's the long term results that count and I've not seen a study yet that proves one is better than the other long term. 

The important thing is to use one of the retinoids listed above regularly and to sunscreen religiously!   Dr. I