If Valerian is being used for Insomnia, then the recommended doseage is 300mg to 900 mg. It is also recommended to try it at night first approximately 30 minutes before bedtime.
This information cannot be provided since the formulation used (tablets, tea, or direct ingestion) can result in widely differing doses. Use the same cautions as for Valium-- same active drug.
Well its recommended that you should take about 300 to 500 grams per day before night. But a sleeping pill is not good to take. So it's better to avoid taking sleeping pills.