Benedryl or namely Diphenhydramine(the chemical name) can give you a feeling of euphoria. It is not safe to take in large amounts and should not be used in this manner. but if you are going to BE VERY CAREFUL! 25-50 mgs is the normal dose. if you take more than that you could go into respiratory or cardiac arrest.
Insulin deficiency (symptom description): For a medical symptom description of 'Insulin deficiency', the following symptom information may be relevant to the symptoms: Diabetes-like symptoms (type of symptom). However, note that other causes of the symptom 'Insulin deficiency' may be possible.
Insulinoma is a tumor of the pancreas that produces excessive amountsof insulin. Insulinomas are more common in women. The tumors are usuallysmall (less than 2cm) and more than 90% of all insulinomas are benign(non-cancerous). Insulinomas produce excessive amounts of insulin and this causes low blood sugar.