Hazrat Maulana Ruum (Allaah have mercy on him) says:

Chuuñ Qazaa Aayad Tabeeb Ablah Shawad

Waañ Dawaa Dar Naf’a Khud Gumrah Shawad

When the time of death of the sick person comes, the senses of the healer devoid, he advices the prescription somewhat else for something, Even if the prescription is correct and beneficial then that medicine instead of its confirmed benefit gives adverse effects

Az Haleelah Qabz Shud Itlaaq Raft

Aab Aatish Raa Madad Shud Hamchuu Naft

Haleelah [herbal medicine] which is for removing constipation, it causes constipation and fluent movement of bowel fades away, Similarly water which is a cool thing like Kerosene oil became the fuel for fever

Excerpt from the Book ‘Zikr e Jameel’ by Hazrat Maulana Muhammad Shafee Okarvi [Rahmatul Laah Alaieh]