As nouns the difference between relaxant and cyclobenzaprine
is that relaxant is something which promotes relaxation while cyclobenzaprine is a particular antidepressant generally prescribed as an analgesic and muscle relaxant.
relaxant
English
Noun
(
en noun)
Something which promotes relaxation.
References
* OED2
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cyclobenzaprine
English
Noun
(-)
A particular antidepressant generally prescribed as an analgesic and muscle relaxant.