Indrani Mukerjea reportedly overdosed in prison, but officials clueless how

Mukerjea has been taking three pills daily for several months. She has been on amlodipine (anti-hypertensive), aspirin (anti-platelet), and amitriptyline (anti-depressant), confirmed Dr. Wiqar Shaikh, who's been treating her.

All three are given to her under 'direct observation,' meaning they are put in her mouth and she isn't allowed to hold them.

This routine has been followed after she overdosed on Benzodiazepine in October'15.

On April 6, around 11:30 pm, she was found unconscious and rushed to JJ. Preliminary investigation indicated fever.

X-ray and CT scan showed a patch in her lung indicating aspiration pneumonia, which happens when food/saliva is inhaled into lungs; this hinted at drug overdose.

Her blood report hasn't showed anything, Dr. Sanjay Surase said.

They are now awaiting reports on urine and stomach samples.

"The problem, which she has got in the cerebral area (in the brain) is exactly what we found in October'15, when she was admitted to JJ for drug overdose," Dr Shaikh said.

He has ruled out amlodipine, since that would have crashed her blood pressure (it was stable when she was brought in).

He has also ruled out aspirin, since that would have caused internal bleeding.

Mukerjea is currently stable and conscious and responding to commands, doctors said. She isn't on life support.

The next treatment would be decided based on her final reports.

She has been lodged in Byculla since 2015, when she was convicted of murdering her daughter Sheena Bora in connivance with her third husband and her driver.

The husband, Peter Mukerjea, is also in prison.