Prosecutors in North Banha have referred the son of ousted president Mohamed Morsi to court on drugs charges.
Abdullah Morsi and a friend were arrested on 1 March for allegedly possessing cannabis.
Both men were released pending investigation after they agreed to give blood and urine samples for a drug test, a top prosecutor said.
The test allegedly showed Morsi and his friend had used drugs.
Hazem Saad, the head of Obour police investigations unit, said Morsi was stopped at a police checkpoint on his way to New Cairo and was found to be carrying two cannabis joints.
Mohamed Morsi, who hails from the Muslim Brotherhood, was ousted on 3 July amid mass protests against his rule. He has been in detention since then and faces multiple charges including inciting the killing of opposition protesters, espionage and escaping from jail.
Thousands of Muslim Brotherhood members have been arrested and most of the group's senior figures are in detention.