Alcohol consumed with the meal may not cause any problems. The symptoms of coprine poisoning can show up within 5 to 10 minutes of alcohol consumption if it has been between 30 minutes and several days since the mushrooms were eaten. The symptoms are fullness, throbbing, flushed feeling of the face and neck, rapid pulse, metallic taste, tingling sensation in extremities, and heartbeat irregularities. The poisoning is unpleasant but usually of only one to two hour duration. However, consumption of large amounts of alcohol within a day or two of eating the mushrooms can result in intensified symptoms lasting up to 8 hours accompanied by vertigo, confusion and collapse.
Headaches can be intense.