According to CIC website: (http://www.cic.gc.ca/english/immigrate/sponsor/spouse-apply-who.asp)
"You may not be eligible to be a sponsor if you:
did not meet the terms of a sponsorship agreement in the past,
did not pay alimony or child support even though a court ordered it,
get government financial help for reasons other than being disabled,
were convicted of
an offence of a sexual nature,
a violent crime,
an offence against a relative that resulted in bodily harm or
an attempt or threat to commit any such offences, depending on the details of the case, such as
the type of offence,
how long ago it occurred and
whether a record suspension was issued (see Sponsorship bar for violent crime below),
were sponsored as a spouse, common-law or conjugal partner in the past and became a permanent resident of Canada less than five years ago (see Five-year sponsorship bar below)
did not pay back an immigration loan, made late payments or missed payments,
are in prison or
have declared bankruptcy and have not been released from it yet.
Other things not on this list may stop you from being able to sponsor a relative.
If you live in Quebec, Citizenship and Immigration Canada must approve you as a sponsor first. Then you must also meet Quebec's conditions to be a sponsor."
Sponsorship bar for violent crime
The sponsorship bar stops people who have been convicted of certain crimes from sponsoring a family member.
If you have been convicted of a crime that caused bodily harm to any of the relatives below, you cannot sponsor anyone under the Family Class.
Note:
“Partner” includes common-law and conjugal partners.
Relatives not listed here may still fall under this category. If you are not sure, check the full list of rules or contact the office processing your application.
Relatives the sponsorship bar can apply to:
your current or ex-spouse/partner and/or their children,
your children,
your parent/grandparent, child/grandchild, sibling, niece/nephew, aunt/uncle, or cousin, or
the current or ex-spouse/partner and children of the above
the parent/grandparent, child/grandchild, sibling, niece/nephew, aunt/uncle, or cousin of your current or ex-spouse/partner or children, or
the current or ex-spouse/partner and children of any of the above
your child's spouse, partner or children,
your spouse's, partner's or child's ex-spouse or ex-partner and children,
your partner's parent/grandparent, child/grandchild, sibling, niece/nephew, aunt/uncle, or cousin, or
the current or ex-spouse/partner (and their children)of any of the above,
a foster child who is or was cared for by
you,
your current or ex-spouse/partner or their children,
your parent/grandparent, child/grandchild, sibling, aunt/uncle or cousin, or
the current or ex-spouse/partner (and their children) of any of the above, or
your current or ex-boyfriend/girlfriend, their spouse or common-law partner, and their dependent children.
I believe your wife can still sponsor you, because her charges were of a different nature (narcotics) than the ones specified on the CIC webpage, but I cannot guarantee this 100%. Better ask a lawyer about this.
