Is a muscle relaxant also effective for bruxism?

Not much. We very rarely use this for bruxism because it does not address anything found to be a cause of bruxism. Side effects of drowsiness and feeling lousy the next day overwhelm the usefulness. If the muscles are very acutely sore, relaxants may be used for a night or two, but not longer.
Maybe. I have honestly not prescribed muscle relaxants specifically for bruxism because my patients have bruxism plus spasticity in other areas. But I have used Botox injections and they are very effective.
A little. Drugs such as muscle relaxants have a temporary effect on jaw muscle activity, although the maintenance of their therapeutic efficacy, their long term tolerability and risk of addiction need further investigation. Better to treat the source of the bruxism. See a TMJ expert.

Related Questions

Other than muscle relaxants and mouthguards, what are treatments for bruxism?

Teeth grinding. Sleep bruxism is a parafunctional activity that occurs in nearly all people. It is simply night-time clenching or grinding of the teeth. Bruxism can cause significant damage to the teeth and tmj. It can be reponsible for tension type headache pain. It is best managed with a devised called a nti which suppresses elevating muscle activity by 70 percent when worn during sleep.
Therapy. Some people benefit from myofacial pain / muscle release therapy. Others from psychological stress relaxation therapy. Mouthguards are still an important component. I would not rule out yoga as a form of stress release.
Stress reduction. Often patient bruxism is a result of daily stress. If yoga, exercise, vacation, reading etc. Are what you do to reduce stress, possibly that may help. Try to determine what may affect you, is it your job, the evening news, or something else? If its night bruxism, do not watch the tv news and try to relax prior to going to sleep.
TMJ/TMD Issues. Sometimes, treatment for tmj/tmd can lead to an improvement to diminishing bruxism or eliminating it. Tmj issues can reappear, so a mouthpiece is recommended, but needs to be the right kind.
Bruxism. Alternative treatments may include Orthodontic tooth realignment, surgical al jaw realignment, occlusal adjustment, biofeedback, stress relieving exercises, mental health evaluation and treatment, diet alteration (both type and timing), change in mattress and/or pillow, and many others. See your Dentist for advice.

I have sever bruxism tried every possible way to stop it (mouth guards, muscle relaxant...)any suggestions PLEASE...havent slept a single night well!!

Bruxism. If you've tried all conservative treatment options in good faith, you need to consult with oromaxillar surgeon for the consideration of surgical correction.

What medication is considered the most effective muscle relaxant?

Muscle relaxants. Basically, almost all of the muscle relaxants are of comparable effectiveness (cyclobenzaprine, methocarbamol, carisoprodol). Some have more abuse potential (carisoprodol [soma]) and valium. The most potent (but too strong for most minor spasms) is baclofen, which is used for patients with spasm due to severe brain or nerve damage (cerebral palsy or multiple sclerosis).

Please help! What is the difference between deplorizing and non-deplorizing muscle relaxants?

Most of these are- -used in surgery to paralyze you while you are under anesthesia. They can be reversed by antagonist meds before you wake up. Some just paralyze you & some cause muscle contraction, & then you are paralyzed. Not the same as muscle relaxants that you take orally. Google it there are books written about them.

Afraid to take my muscle relaxant, what to do?

Review indications. For use, potential side effects, mechanism of action and target symptoms either on the internet or with your pharmacist to make an informed decision. Take care.