Taking insulin without diabetes can lead to serious consequences, including hypoglycemic coma, which can have varied outcomes from complete reversal to death. Insulin is naturally produced in the body to control blood sugar, and those who cannot produce it on their own inject it into their body as a method of treating diabetes. However, when it is given to the wrong person in the wrong dosage, it can be a dangerous drug. The drug can drastically lower the blood sugar level, which can lead to irreversible brain damage. Glucose is the fuel needed by all our organs, and when it is not available, the body can access the fuel from fatty acids of other ketones. However, the brain can only use glucose as an energy source. If someone overdoses beyond a point with insulin, the blood sugar will go down, and the brain will suffer irreparable damage.

In summary, taking insulin without diabetes can lead to hypoglycemic coma, which can have varied outcomes from complete reversal to death. It is a dangerous drug when given to the wrong person in the wrong dosage, and it can drastically lower the blood sugar level, leading to irreversible brain damage.