you should not use tablets for MTP
with out consulting the doctor.
as sometimes pregnancy
can occur extrauterine also which is called ectopic pregnancy,
if tablets are used without confirming the position of the gestational sac
there is possibility of rupture which will become a surgical emergency.
so you first consult local gynecologist,
let your wife get examined and get one ultrasound
then depending on the result with your doctor's advice you can plan.