A top doctor in Germany is under arrest for killing a lover with cocaine while she performed oral sex upon him.

Police say Dr. Andreas Niederbichler is being probed for giving three more women the drug during sexual encounters although they suffered no serious adverse effects.

Police believe the 42-year-old sprinkled the drug on his penis beforehand.

Dr. Andreas Niederbichler has been charged with bodily harm leading to death

The plastic and reconstructive surgeon worked at the Ameos hospital

As a plastic and reconstructive surgery expert he practiced nationwide and detectives say there may be many more victims.

Niederbichler was appointed head doctor in his field at the Harzer Clinic in the state of Saxony-Anhalt in 2016.

According to recent reports in the German media, he is the new chief physician at the Ameos Hospital in Halberstad.

What his superiors did not know was that he used an online dating site to meet women for sex.

Prosecutors say a 38-year-old woman was involved in consensual oral sex with the doctor on February 20 when she collapsed at his home in Halberstadt.

His apartment was within clinic grounds and she was raced to hospital in an ambulance but died soon after being admitted.

The woman collapsed at the doctor's home in the town of Halberstadt (file picture)

Prosecutors say he gave her cocaine without her knowing about it.

He is charged with bodily harm leading to death.

Chief prosecutor Hal Roggenbuck said: 'The victims who have been heard so far have all indicated that they have been ill at the meetings.

'All of them showed reactions due to the use of narcotics.'

The women all said they willingly performed oral sex on him.

The suspect is not in prison but in a secure drug dependency unit where he is undergoing treatment for addiction.