k - it's called a Bach Flower remedy. Totally safe for anyone, anytime.

Chemists usually have it, or try a health food shop.
Just get the drops, don't worry about any other form it may come in. Put either 5-7 drops under tongue once you have sworn at your friends and kicked the dog OR drops in you water like I do. It's actually more powerful the more dilute. Always shake it before you ingest, I will only bore you with the reasons if you ask.....