Ibn Qayyim in "Medicine of the Prophet" said, "Blackseed helps against all types of cold ailments. In addition, blackseed helps introduce the effective ingredients of cold medications to the areas affected by hot and dry ailments, as it helps the body absorb the medicine quickly when taken in small dosages. The author of the 'Qanoon' and other people stated that saffron blended with camphor has similar effects, because saffron helps the camphor reach the affected area quickly. There are several types of plants that have similar effects as saffron. It is possible that the hot substance benefits in cases of hot diseases.”