I take 15 drops of Passion Flower when my anxiety is high and my heart won't chill out. If it's moderate I'll just take 10 drops. The first time I tried it I just took 5 to help me sleep and I was out in 10 minutes. It's not a sedative like Valerian Root. So don't worry of it feeling like a sedative. You just feel calm and more relaxed because it promotes GABA.
I've been using it for 2 years. initially to help me go to sleep. Worked amazingly well. And I used it for my new found anxiety and still works wonders. Takes 5-10 minutes to feel the effects. The instructions say you can take I think 30 drops in one sitting more than once a day so I'm well under the recommended dose. For my anxiety it can last from 1-3 hours. I just take it as needed.
Same for the PharmaGABA. I get these chewable tablets and I'll take up to 2 tablets 3 times a day if needed. But lately I may only take it once or twice. With the PharmaGABA you can take it regularly 3 times a day if you want to have good GABA levels every day if you really are struggling. That's what I did in the beginning. Took it 3 times a day no matter what so stayed leveled anxiety wise.
PharmaGABA can take up to an hour to feel it. So Passion Flower drop is a lot more fast acting. And again, none of these act like sedatives. You just feel calmer. Kinda like with Magnesium. And the Passion Flower drops, they say put it in water, I just skip that and just drop em right in my mouth. Better for when you are ready to doze off in bed and not have to wake up and go to the restroom.