Hi dear .
I had gone through your query .
Depression plus
drug abuse is very difficult to treat .
It had multi modality approach .
1st proper psychological evaluation is necessary to find underlying psychopathology .
2nd treatment of depression is must.
It can be traeted with medicine like combination of
SSRI and benzodiazapine .
In SSRI
sertraline / escitalopram / peroxetine will help.
Benzodiazapine can help to reduce withdrawl features of
amphetamine abuse.
Amphetamine itself psycho stimulating and lead to various psychological problems .
3rd is De addiction of drug abuse.
Indoor psychiatric care is must.
Medicines /
psychotherapy /councelling etc will be useful .
Consult
psychiatrist and get help .
I hope I have answered your question .
Still if you have a query then feel free to ask .
Happy to help you further .
Thank you .