When a habitual drunkard or an opium addict consumes his alcohol or let's say opium, he becomes drunk or stoned. If not, he starts acting moody or strange, smashing things, feeling pain in his body, or simply being too lethargic.
In other words, if the least amount of a narcotic in a person's blood, based on the habit that he himself developed, is 3 mg, using 4 miligram makes him stoned/drunk and dropping the level of narcotic to 2 mg makes him [the word].
Both formal and informal ways to describe this state are welcome.
Note (for Persian speakers): The word I'm looking for is خمار.
Edit: Based on the answers given so far I get the impression that there is probably not a single specific word with this description. So I include a continuum here that may be helpful.
[ word ] ------> sober -------> intoxicated
Definition: the state of being a drug user who didn't get his drugs on time, esp. when it refers to being lethargic.