Bactroban Drug Information and Side Effects on HealthSquare.com See all our sites for your special health needs at www.HealthCentral.com Apply it as soon as you remember. If it is almost time for the next dose, skip the one you missed and go back to your regular schedule. The effects of Bactroban during pregnancy have not been adequately studied. If you are pregnant or plan to become pregnant, inform your doctor immediately. It is not known whether Bactroban appears in breast milk. Your doctor may advise you to discontinue breastfeeding until your treatment with this medication is finished.