SKELAXIN vs TONMYA

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated June 7, 2026·How we rate

Possible drug interaction. SKELAXIN and TONMYA are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Attribute	SKELAXIN	TONMYA
Rating	New	New
Pharmacy pays	~$11.97 /30	~$0.63 /30
Type	RX	RX
Active ingredient	METAXALONE	CYCLOBENZAPRINE HYDROCHLORIDE
Manufacturer	King Pharms LLC	Tonix
Dosage forms	Tablet	Tablet, orally disintegrating
Drug class	Muscle Relaxant	Muscle Relaxant
Boxed warning	None	None
Half-life	about 9 hours (terminal half-life 9.0 ± 4.8 hours after a 400 mg oral dose, fasted; ~8 hours at 800 mg)	about 18 hours (range roughly 8 to 37 hours) for the standard immediate-release tablet in typical adults
Treats	Muscle Cramp, Muscle Rigidity, Muscle Spasticity	Muscle Cramp, Muscle Rigidity, Muscle Spasticity

skelaxin tonmya

Rating

New

Pharmacy pays

~$11.97 /30

~$0.63 /30

Type

Active ingredient

METAXALONE

CYCLOBENZAPRINE HYDROCHLORIDE

Manufacturer

King Pharms LLC

Tonix

Dosage forms

Tablet

Tablet, orally disintegrating

Drug class

Muscle Relaxant

Boxed warning

None

Half-life

about 9 hours (terminal half-life 9.0 ± 4.8 hours after a 400 mg oral dose, fasted; ~8 hours at 800 mg)

about 18 hours (range roughly 8 to 37 hours) for the standard immediate-release tablet in typical adults

Treats

Muscle Cramp, Muscle Rigidity, Muscle Spasticity

Frequently asked questions

Which is cheaper, Skelaxin or Tonmya?

Tonmya costs pharmacies less to acquire — about $0.63 vs $11.97 for a 30-count supply, per the CMS NADAC survey. That gap is in the pharmacy's cost of goods, not necessarily in what you pay: your price is set afterwards by your insurer and the pharmacy.

What is the difference between Skelaxin and Tonmya?

Skelaxin contains Metaxalone, while Tonmya contains Cyclobenzaprine Hydrochloride — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.