St. Joan's/John's wort
This beautiful perennial wildflower may be hated by sheep farmers but herbalists adore it. The flowering tops are harvested after they begin to bloom (traditionally on Solstice, June 21) and prepared with alcohol, and with oil, to make two of the most useful remedies in my first aid kit. Tincture of St. Joan's wort not only lends one a sunny disposition, it reliably relieves muscle aches, is a powerful anti-viral, and is my first-choice treatment for those with shingles, sciatica, backpain, neuralgia, and headaches including migraines.
The usual dose is 1 dropperful (1 ml) as frequently as needed. In extreme pain from a muscle spasm in my thigh, I used a dropperful every twenty minutes for two hours, or until the pain totally subsided. St. Joan's wort oil stops cold sores in their tracks and can even relieve genital herpes symptoms. I use it as a sunscreen. Contrary to popular belief, St. Joan's wort does not cause sun sensitivity, it prevents it. It even prevents burn from radiation therapy. Eases sore muscles, too.