Is it Possible for Undereye Restylane to Drop to Frontal Cheek Pad?

It's possible. However, I would follow up with the provider for assessment. Without seeing you in person, it's difficult to know whether or not you had any fat they were working around when injecting the tear trough, or whether you're having some expected swelling.

Without photos, it sounds as if you may be experiencing swelling.. If this is the case, it will improve. As other panel members have mentioned, it is best to wait 10-14 days before deciding how things have "settled."  It is rare for product to migrate, but if it has occurred you can use Vitrase to correct this.

There are several possibilities here:

1. You are still swollen.

2. Filler was put in the wrong place.

3. You are holding more water in association with the treatment than is idea.

The treatment for the first possibility is simply allowing more time for things to settle.  The treatment for items 2 and 3 is adjustment with the enzyme hyaluronidase.

At Cosmetic Boot Camp, one of the most comprehensive courses for board certified dermatologists and plastic surgeons, the consensus is always, every year, that Restylane is the preferred filler for the tear trough area. This is because it "sticks" better where it is injected. The likely explanation for what you are expereincing early on is swelling. Be sure that you do not sleep face down; try to sleep on your back on 2-3 pillows. Avoid alcohol and salty foods. See your treating physician if it is not better in 5-7 days.

Although it is extremely rare, there are reports in medical literature of fillers migrating. However, I would wait and make sure what you are seeing isn't swelling.

Restylane, and other fillers as well, do not migrate. Suboptimal placement or some persistent swelling may give you that appearance. If the accentuation is persistent, hyaluronidase can be used to "erase" some of the filler.

The Restylane does not drop, but it is possible you have edema from the Restylane compressing lymphatic drainage under your eyes.  If it does not resolve after two weeks, revisit your MD who can inject hyaluronidase to remove the product and resolve the swelling. 

You need to evaluate things after all the swelling has gone down. With undereye injections, the swelling will continue to move down the face as it diminishes. This will distort what your filler looks like a bit while it's resolving. I'd recommend you wait and see how everything looks in 7-10 days and then evaluate with your injector how things look and what might need to be done, if anything.

Possibly, however it sounds more like gravity pulling the swelling down the face which is typical for swelling in and around the eye area.