Given the serious and well-documented health risks associated with mercury exposure, using mercuric sulfide (HgS) as "medicine" would be classified as "Extremely High Risk" on your scale. This is comparable to driving at 200 mph on a highway in terms of the danger it poses to health and safety. It's strongly recommended to avoid using substances like this for medicinal purposes and to consult healthcare providers for safe and effective treatments. Discleamer: 这是gpt说的