When is a person deemed to have died?

If people pretend to know medicine and prescribe remedies, but they are not doctors, and they cause the death of a sick person, is the ruling the same as that on one who killed deliberately?

What is the ruling on using the douche that women use to clean their private parts?

Are there any guidelines or conditions with regard to using the black seed?

Ruling on administering anaesthesia at the time of death

Warning against message that are spread on the Internet, for which there is no basis in Islamic teaching

She gave a painkiller to a patient with heart failure and the patient died

Ruling on informing a patient that he will die soon

Teachings of the Prophet (blessings and peace of Allah be upon him) on maintaining good health

Ruling on taking samples from the deceased for the purpose of testing