Can diflucan (fluconazole) interfere with birth control pills?

Diflucan. Per Drugs. Com -Oral contraceptive pills (OCP) & other hormone-based birth control may be less effective when Diflucan (fluconazole) is used wi recommendation for use of backup birth control. BUT Pfizer Medical Information. Com – indicates that there was no effect on OCP at 50mg of Diflucan & there were higher levels of ethinyl estradiol & levonorgestrel with higher doses of Diflucan. Single dose.
No. I haven't not seen anything written re: Diflucan (fluconazole) causing the pill to be less effective, etc. As a matter of fact, the birth control pill does not lose effectiveness in the face of many antibiotics - much to the surprise of many ob/gyns.