The Canadian Pharmacy Association says the Canadian pharmaceutical giant is selling $100,000 worth of bleach to a pharmacy in Toronto.
The group says the sale is for a product called CVS-branded bleach.
The sale is the latest example of drug companies trying to make money by selling cheaper and generic drugs.
The Canadian Pharmaceutical Association says its members have a financial incentive to sell less expensive products.
It says the CVS bleach deal is one example of the pharmaceutical industry trying to push up prices for patients.
CVS says it has never sold bleach to pharmacies.