Cauterizing a Vein
Scholars have said that if one dreams of cauterizing one of his veins, it may indicate that he will be blessed with a female slave, or he will get married, or a stranger will see his wife. As for theriac, it was mentioned that Ibn Sirin disliked seeing it in a dream.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam