Ekweremadu was being grilled over his numerous assets in Nigeria, United Kingdom, United States and United Arab Emirates (UAE).
He was asked to account for how he came about over 60 assets.
When it appeared that he was getting weak, the Deputy Senate President was permitted by the EFCC to seek medical attention in the hospital.
The resumption of the investigation on Ekweremadu’s assets will now be determined by his fitness and the medical report from the hospital, it was learnt.
A top EFCC source said: “We were able to highlight additional 38 assets, added to the initial 22 on which he ought to give explanation.
“The grilling started smoothly until he complained of discomfort and he was unable to continue to answer our questions. His sudden illness might have arise from high blood pressure.
“Since he needed urgent medical attention, we allowed him to go to the hospital of his choice for treatment.”
The Federal Government, through the Special Presidential Investigation Panel for the Recovery of Public Property, had traced 22 assets to Ekweremadu.
The said assets were suspected to have been acquired through illicit funds.
