I noticed that OP asked for natural stuff and most people replied with prescription drugs. Isn't that curious.
Natural muscle relaxants:
Electrolytes in balance. Magnesium, potassium, calcium, lithium. Potassium potassium potassium in the hundreds of milligrams. Magnesium alone won't cut it.
Dietary supplements: GABA, tryptophan (not 5-htp), maybe theanine (some people find theanine more stimulating than relaxing). Taurine.
Don't listen to morons telling you GABA doesn't work because the molecule is too large to cross the BBB. They are parroting nonsense perpetrated by supplement manufacturers who want to sell you something more expensive than GABA. Crossing the BBB is not the point. GABA works vs placebo because your gut is chock full of GABA receptors - and why? Because your gut flora secrete GABA, as well as serotonin, dopamine, oxytocin, and all kinds of other goodies. Your intestines are densely packed with receptors for all of these neurotransmitters.
Probiotics and prebiotics (like fiber).
Herbaceous relaxants you can pick up in liquid form with droppers:
kava (do not use this daily)
Do some reading on essential oils and only purchase from trustworthy manufacturers like Aura Cacia.
high-grade vanilla extract (CO) blended with jojoba oil
lemon (just lemon EO) ... one of the few EOs that has been demonstrated to actually affect your oxytocin
There are some essential oils that are purported to be able to relax muscles but are also mental stimulants of a sort, so you may or may not like these. These would include things like peppermint, wintergreen, rosemary, camphor, menthol
Don't mess with cholinergics. I see a lot of bad advice around here. Talk of fish oils and whatnot are also questionable for your purposes, since these play on your dopamine and therefore your norepinephrine. You may have an undesirable result with your muscle pain because of this (increased muscle tension, for example). But it depends on what the underlying cause of your muscle problems is.
Unfortunately, natural alternatives are unlikely to be as effective as prescription muscle relaxants, especially if you just use one or two and don't devise some kind of synergistic combination. But they are also less likely to cause adverse effects.
Edited by Duchykins, 03 February 2017 - 06:54 PM.