No side effects have presented themselves during my 4 years of its use for muscle &trigger point spasm due to fibromyalgia. It’s actually been somewhat of a miracle drug for me after being on heavy narcotics for many years. Sleep is still not sound or refreshing, but melatonin helps with that occasionally.

I use Valerian root for my very anxious horse before we go to intense events. The vet recommended it because it is so safe and had no side effects except making her very mellow. I would assume the same goes for humans. She is able to still get her job done it just takes off the edge.

If you use it for long periods of time it can cause headaches, insomnia (yes, this is true), and agitation.

It keeps most people relax, or drowsy….which that is the effect of it. WHen I used it….waking up in the morning gave me a headache, so I stop using it.

None. Valerian has been used safely for 1000 years