In the past few weeks, Duale has been issuing a series of directives to healthcare regulatory bodies in quick succession.
The Senators warning comes amid a fallout between President Ruto and some ODM officials.
Malala also hit out at Ruto over his comments on the Butere Girls High School drama.
The case has been in the Kenyan courts for close to a decade.
The officer had appealed his sacking to the Public Service Commission.
The majority of those left out have, in the past, decried long processes in follow-ups.
The state visit to China by President Ruto is expected to end on April 26.
The outspoken Senator has pointed an accusing finger at the government over the rising deaths.
Uhuru's team has been involved in peace talks since early 2022 and received a new mandate last month.
The move comes after numerous cries from stakeholders.