Death is within minutes - only cyanide is quicker. Opium and Morphine Raw opium very seldom used as a poison as acts slowly and has a strong smell. Morphine is a white crystalline substance extracted from opium. Used as analgesic, but overdose can be fatal. Fatal dose varies but usually about 5 grams.
Symptoms start within minutes.
Face swollen and coloured. Patient feels cold. Breathing slow and noisy. Pulse slow and weak. Death is by respiratory failure.