In the medical profession, this difference is called a narrow therapeutic index, which is the ratio of a drug's toxic dose to its therapeutically desirable dose. It is also why barbiturates are not often prescribed today.
It is not an addiction, it is tolerance to the medication. Read more Might suggest this be dealt with like one handles stage fright. Another choice, alprazolam, which could keep you more awake.
But even with intensive therapy, some who overdose will die.
Is probably the most readily available sedating antihistamine.
The doctor cannot give appropriate treatment for barbiturate abuse over the telephone.
Observation at a hospital emergency department is necessary.