Can painkillers make you homophobic or racist?

The ex-Ukip candidate Kerry Smith claimed that he made offensive remarks due to stress and the fact that he was taking strong sedatives. So should pharmaceutical companies issue new side-effects warnings, asks Emine Saner

Should I stop smoking cannabis?

A review of 20 years of cannabis studies has resulted in apocalyptic headlines about the harm caused by the drug. Is it really more dangerous than previously thought? Luisa Dillner reports