In a word, yes. Let’s look at how. Firstly, we should examine how snoring occurs.

An obstruction can be caused by a number of things: the soft tissue in the back of the throat collapsing during sleep, inflammation in the throat or nasal passages, or excess weight around the throat which causes the tongue and soft palette to sink down, which also happens when we fall into a deep sleep due to drinking too much or taking medication.
A snoring mouthpiece works by repositioning your lower jaw so that it sits slightly further forward. This adjustment prevents the soft tissue and tongue from falling backward and partially blocking the airway which leads to snoring, opening the airway to allow for the free flow of air and preventing the vibrations caused when air is forced through. Even if your nasal passages and sinuses are blocked, the air will still move freely with the help of a snoring mouthpiece.

The mouthpiece is similar to a gum guard used by sports people. SnoreMeds mouthpieces are made from BPA and latex-free FDA-cleared Thermoplastic which can be moulded to your mouth through a simple process at home: drop it into boiling water, insert it into your mouth and use your fingers and tongue to mould it. This process can be repeated if the fit is not quite right the first time.
As with all treatments, people report the varied success of using a snoring mouthpiece to treat their snoring. They work best for people who suffer from simple snoring or mild to moderate sleep apnea. It doesn’t seem to assist much when the user has severe obstructive or central sleep apnea so if you find a snoring mouthpiece doesn’t help, it would be worth visiting a doctor to ensure you are not suffering from one of these more serious conditions rather than simple snoring.
A snoring mouthpiece isn’t always comfortable immediately, and for the first few nights the repositioning of the jaw may lead to a bit of an ache the next day, but this usually goes within a few hours of waking up and no longer worries users at all after a few days. Overall, users report finding the device quite comfortable after a few nights of continuous use.
Another common issue is that the mouthpiece causes saliva to build up in the mouth, or makes the teeth feel tender. Again, these symptoms settle quickly with regular use. Over the long term, there may be tooth movement, changes in your bite or problems with the joint and muscles of the jaw. It is important to have a regular check-up with the dentist who supplied the appliance to detect these problems early, so they can be dealt with.
For the majority of people who try it, a mouthpiece which can be moulded to their mouth does alleviate snoring if not eliminate it altogether and if it doesn’t prove effective, a simple re-mould generally does the trick. Another issue could be that the size is wrong. SnoreMeds snoring mouthpieces come in two sizes: regular, recommended for men, and small recommended for women.