The CBI's anti-corruption unit had written to the State government seeking sanction to proceeding against the two former ministers, two former DGPs and seven others.
It also sought permission for action against former DGPs TK Rajendran and S Geroge, who had worked as Chennai Commissioner of Police under the previous government.
Over 100 witnesses were cross examined and this includes those by counsel for Sasikala and the hospital's advocate on matters having a bearing on treatment to Jayalalithaa.
According to ED sources, the former Tamil Nadu health minister was called for interrogation following a cheating case registered by Kerala Police at Angamaly Police Station in 2016
DVAC officials on Friday searched the residential and business premises of people associated with former Health Minister C Vijayabaskar.
In 2017, during the RK Nagar by-election, I-T officials carried out searches at the residence and on business premises belonging to Vijayabaskar, and his associates.
DVAC files disproportionate assets case against former AIADMK minister C Vijayabaskar, raids 43 locations
Vijayabaskar is the fourth former AIADMK minister to be raided by the DVAC, after MR Vijayabaskar, SP Velumani and KC Veeramani.
He said the incidents of dengue fever have come down due to the state government taking steps on a war-footing to check the vector-borne disease.
Hassan recently took to his Twitter handle, informing fans not to distribute the Siddha medicine until a proper research is conducted.
In a tweet, meanwhile, actor Kamal Haasan asked his fans to "not engage in the distribution of Nilavembu till the results of proper studies are out."