New scare for miraa users

A new study in Nairobi says miraa (khat) chewing causes serious mental problems in humans.

The report comes weeks after Government scientists gave the herb a clean bill of health. It reported high rates of mental illnesses among heavy miraa users in Nairobi.

Heavy miraa users, the study says, are depressed, suffer from post-traumatic disorder (PTSD) and psychosis expressed as hallucinations and delusions.