What is the ruling on consuming medicines that contain a very high concentration of alcohol ( over 90%) as a preservative? Is it permissible to consume them directly or after diluting them with water? Under what circumstances would their use be permissible, or should they be avoided altogether?

Ustadh AbdulAziz al-Haqqan

I am not a doctor to tell you how to use the medicine, may Allah reward you. Also I do not know your medical condition. Thus, seek out a Muslim trustworthy doctor and ask him about the medicine and alternatives to it.