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.
Any such cases should be referred to a doctor for diagnosis and treatment. Diabetes is a syndrome in which the basic defect is an absence or shortage of the pancreatic hormone insulin. This deficiency disrupts the vascular system, affecting the eyes, kidneys, legs, and other extremities such as the feet.