Safety First: Many customers have expressed concerned about taking California poppy in regards to drug tests. After several years of working with this plant, I have not had anyone test positive on a drug test, nor have I heard of this happening with other people in regard to this plant. I consider this to be a nonissue when the plant is used in moderation. All my dosage recommendations are low to moderate. Per herbalist Matthew Wood, this poppy is not depressing or narcotic in its effect.