A 59-year-old man from Ioannina, northwestern Greece, was yesterday hospitalized in severe shock after fatally stabbing his 34-year-old son following an argument. The father often fought with his son, who was a drug addict and would become «a completely different person under the influence of narcotics,» neighbors told police. During yet another argument at their home in the village of Lapsista, the 59-year-old grabbed a knife and repeatedly stabbed his son all over his body, police said. The victim was transferred to a Ioannina hospital but died of his injuries about five hours later, according to doctors. The father, who was last night being treated for shock in the same hospital, is to face a local prosecutor once he is discharged, police said.