No details; please see question.
Sexual Harassment Attorney
One year in County jail is the maximum for misdemeanors in Ca. I would need to know what the prior drug convictions were and if you were on probation to give more information.
My standard disclaimer: I am not offering legal advice, assume I do
not know the law in your state or at all for that matter and that I am
just making suggestions for starting points for when you do speak with
an attorney. Do NOT rely on anything I write and contact a lawyer in
your area immediately after reading my posting.
The petty theft itself as a misdemeanor carries up to 6 months in county jail and/or a $1,000 fine.
The prior drug convictions will only matter if you're on probation or parole currently. If so, the new theft charge could violate you on probation/parole and subject you to punishment on those.
Petty theft from a retail store under $50 can also be an infraction.
Assuming you are not on probation for the priors, the max is either 6 months and/or a $1000 fine if it is a misdemeanor. Depending on the facts, commercial burglary could also be filed. But if it is under $50, it could simply be an infraction subject to a fine only.