BOTOX for Muscle spasms: Side Effects & Safety Data

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There are 33 adverse event reports in the FDA FAERS database where BOTOX was used for Muscle spasms.

Most Reported Side Effects for BOTOX

Side Effect	Reports	%	Deaths	Hosp.
Off label use	175	20.5%	5	12
Drug ineffective	162	19.0%	0	1
Dysphagia	72	8.4%	1	13
Muscular weakness	65	7.6%	0	8
Headache	64	7.5%	0	3
Eyelid ptosis	49	5.7%	0	1
Therapeutic response decreased	49	5.7%	0	0
Wrong technique in drug usage process	48	5.6%	0	0
Neck pain	44	5.2%	0	2
Injection site pain	43	5.0%	0	1
Dyspnoea	35	4.1%	0	7
Pain	35	4.1%	0	4
Influenza like illness	33	3.9%	0	1
Asthenia	32	3.8%	0	7
Dry mouth	31	3.6%	0	2