11. She tests him by slipping vervain into his drink and he reacts negatively to it. 12. Elena gets alone with Damon and she forces him to drink vervain to weaken him. 13. Elena manages to lead Stefan away from the others and Alaric shoots him with vervain . 14. Alaric ( vervain and takes his blood. 15. Common vervain was scientifically described by Carl Linnaeus his 1753 " Species Plantarum ". 16. Damon gives her the vervain and tells her she owes him-and he will collect. 17. Blue Vervain can be used to strengthen and regenerate the nerve system while relieving tension and stress. 18. Giuseppe spiked Stefan's drink with vervain and, later that night, Katherine bit him. 19. He shoots Damon up with vervain but before Damon passes out he stabs him in the neck. 20. He shots her with vervain and takes her away while Caroline watches from her car in shock.
