Kenya Medical Practitioners, Pharmacists and Dentist Union Secretary General Davji Atellah has issued a strike notice if Dr Austin Omondi popularly known as Japrado, is not released with immediate effect.
Taking to his X account on Sunday, Atellah condemned the alleged abduction.
"We demand the immediate and unconditional release of Dr Austin Omondi. Should he not be safely returned by midnight, we will initiate the closure of all public and private medical services to locate our colleague," he said.
"Dr Austin last evening reported to us that strange people have been calling him and issuing death threats to him due to his involvement with the 'Medics for Kenya' activities where young medics have been offering free medical aid and leading in blood donation drive to help injured protesters."
He stated that the Nyayo days are long gone, cautioning anybody who tries to take that path.
He stated that such individuals will be "forcefully dragged back into the straight and narrow path of political accountability".
Dr Omondi is alleged to have been arrested around 1.20 pm on Sunday while conducting a blood donation drive at Sikh Union, Ngara, Nairobi.