17 Musculus sternocleidomastoideus bør ikke injiceres bilateralt, da der er en øget risiko for bivirkninger (især dysfagi), når bilaterale injektioner eller doser over 100 E indgives i denne muskel.
The sternocleidomastoid should not be injected bilaterally as there is an increased risk of adverse reactions (in particular dysphagia) when bilateral injections or doses in excess of 100 U are administered into this muscle.