Fake medicine is a reality in Nigeria and the country has been battling the trade in counterfeit drugs for over 20 years.

A recent report said that more than two-thirds of malaria medicine in the country was fake or substandard, with some pills containing just chalk or sawdust.

But now more packs of medicine are being given a unique code which once sent by text message will reveal if the drugs are safe to take or not.

The BBC's Will Ross reports from Lagos.