It is true that the efficacy ( ie the effectiveness ) of the OCP's does reduce when taken concomittantly with antibiotics . However the nuva ring is applied locally and thus the hormones are released locally and there is little or no metabolism it goes through as it does not enter the systemic circulation and thus there is little effect on the efficacy when taken with antibiotics. However it is still adviced to use back up protection during that time period. I hope this helps.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.