Bogey is horrible on car ride, thunderstorm, construction noise and I have been debating about Rescue Remedy. I finally bought some the other day and now I am wondering about dosage. He's a big boy close to 13 lbs of yorkie lovin'

He loves to go in the car and on walks but is a total freak when I take him.
What dose should be given?
Can I overdose him?
What experience has everyone else had with Rescue Remedy?
How much time should I allow from the dose to the time we go in the car?
Has anyone seen an adverse reaction to using this?