All three drugs have passed initial safety tests in both animals and humans.

The drugs passed through the human system unimpaired in strength.

Some drugs, like the large proteins developed by biotechnology, will not normally pass through the skin at all.

It is not known whether this drug passes into breast milk.

It is not known whether this drug passes into breast milk when used on the skin.

This drug can pass through your body in breast milk and should not be used if you are breast-feeding.

These drugs can pass through your body in breast milk and should not be used while you are breast-feeding.

The company responded by saying the drug had passed safety and clinical trials.

It is unknown if this drug passes into breast milk.

This drug passes into breast milk and the effect on a nursing infant is not known.