Does Latisse Work Better Than Revitalash?

My suggestion would be to use up your Revitalash (we used to sell it but no longer do) and then switch to Latisse.
Latisse is the same price (actually $5 cheaper than we used to sell Revitalash for) and it works better because the active ingredient that is used in Latisse was removed from Revitalash in the recent past based on a lawsuit between the two companies that produce the products.

There are many over-the-counter eyelash products available.  Latisse is the only prescription strength one available and the most popular we carry in OC Dermatology.  While some of the other products (called "lash conditioners") work well to grow lashes, nothing grows them as long as Latisse.  If the other products did work as well, than they are illegally including prescription bimatoprost (or a similar prescription product) in the formula, which would make it a prescription product if not legitimately. 

We have have carried both in our office, however, currently only sell Latisse. We have had a higher patient satisfaction with Latisse.

Latisse is approved by the FDA and grow eyelashes longer, thicker , and darker.  Revitalash grows eyelashes longer and thicker but not darker. The onset time for Latisse is different for each patient.

Both products work. Latisse has been studied and has passed FDA approval. There are controls in place in Latisse production because of the FDA regulation that ensures that the product you purchase is sterile and has the specified amount of active ingredient in it. I am not knocking Revitalash, I used it before Latisse was available, but it is not FDA approved and therefore not as carefully regulated. If your Revitalash is fresh, it is hard to suggest throwing it out, it is expensive. I would recommend switching to Latisse when you need more product

These are two different things.
Revitalash is an eyelash conditioner that claims to make your lashes appear fuller, (think conditioner for your hair). It is not a medicine. It does not have FDA approval. As of this writing, there are no clinical, scientific trials published in a peer reviewed medical journal.
Latisse consists of an established medicine that has been used for years to treat glacoma. They found some glaucoma patients had significant eyelash growth. Allergan configured it to be a topical medicine for eyelash growth. They went through the rigors of FDA approval. The science says that it keeps the lashes in growth phase. Clinical trials showed that it can lengthen eyelashes 25% and thicken them 106%, later with more use, and will darken them.

Latisse is the only FDA approved eyelash enhancer for hypotrichosis of the lower eyelids. Revitalash and other cosmetic mascaras are not FDA approved but are marketed for very similar indications. The efficacy of Latisse, or Bimatoprost 0.03% solution, has been published by Allergan along with its high safety profile.

Latisse is the only FDA-approved prescription treatment used to grow eyelashes. Latisse make the eyelashes longer, thicker and darker. Revitalash, on the other side, improves only the length and the thickness of the lashes, not the color, and it isn't FDA-approved. Revitalash is a cosmetic conditioner, not an active ingredient.

Latisse was recently released by Allergan and contains the active ingredient, Bimatoprost (Lumigan) a prostamide analogue. This drug was initially intended to treat glaucoma, an eye disease. It was noted that patients who recieved this medication reported increased eyelash growth as a side effect. Another unwanted side effect was pigmentation (darkening) in the eyelid skin.
Based on these finding Allergan produced the product Latissed with the sole purpose of promoting eyelash growth. It is intended to retail around $120.
The acitve ingredient in Revitalash (retails at $150) may be acting in similar ways to the Bimatopraost, and 'according to a company spokesperson, the active ingredient in this product (RevitaLash) is 17-phenyl trinor PGS20 ethylamide, a prostaglandin analogue.'

Revitalash also cautions that discoloration of the eyelids may occur.
There is great controvery in the regulation of these products. Because they are promoted and marketed as cosmetics they are not subject to regulation by the FDA. However there are strict guidelines and recommendations in application of this product to avoid side effects. Some of the instructions seem conflicting. For example Reviatlash has a disclaimer on the website stating that 'RevitaLash is not intended to… promote the growth of eyelashes' They then follow with a contradictory statement noting that the product is marketed as a cosmetic intending 'only to promote the attractiveness, enhance the beauty and improve the appearance of eye lashes' with the protective clause 'all claims for the product shall be limited to these intended uses.
Latisse is FDA approved and more highly regulated.
IN SUMMARY:
REVITALASH
NOT FDA approved
Upper AND Lower Eyelashes
Retails: $150
LATISSE
FDA approved
UPPER eyelashes ONLY
Retails: $120

Latisse, a prescription drug learned from treatments for glaucoma, has many controled studies regarding safety and efficacy for certain hair promotion needs.  Studies now show that hair promotion has been proven to thinned hair in both the eyelash area and eyebrows.    Since it requires a prescription it filters patient to get a proper history and physical to be certain that it is safe to use for hair promotion in the aforementioned areas.
I hope this is helpful to you.
Steve Greene MD