Antibiotics 'may reduce effectiveness of contraceptives'

The study found unintended pregnancies were seven times more common in reports where antibiotics were also used than when compared with other medicines. File Picture.

Taking antibiotics may reduce the effectiveness of birth-control pills, researchers have said.

In a study, published in the British Medical Journal's Evidence Based Medicine, scientists advise women should take extra precautions to avoid unwanted pregnancy when they are on antibiotics.