Perceived effectiveness for Muscle spasms:
Not at all
Advice & Tips:
Tylenol with codeine has no effect on my migraines or cluster headaches, but works wonders for muscle aches and spasms when they're enough to keep me awake at night. I usually take it 30 minutes before bed so that when it makes me drowsy, I can just lay down and not worry about it. I never use this before a day of work, for fear of not waking up to the alarm.