Medical experts have told an inquest there is no proof a Brazilian student died in the Sydney CBD as a direct result of being tasered.

Coroner Mary Jerram is investigating the death of Roberto Laudisio Curti who was tasered multiple times by police, handcuffed and sprayed with capsicum spray in Sydney in March.

The inquest has heard that Tasers were discharged 14 times as 11 officers detained Mr Curti.

The 21-year-old had stolen two packets of biscuits and was in a psychotic state after using LSD.

Four medical experts have told the inquest that, although the student had bruising and abrasions on his body, there is no proof he died as a direct result of being tasered.

The panel said his death was probably caused by a combination of things.

The inquest continues.