Hi welcome to Health care magic forum.
Thanks for calling H.C.M.Forum.
Your husband aged 50 yrs, normal health have fluctuation of B.P.between 100/70, and 140/100.taking
losartan 25 daily on doctors advise.
The fluctuation is from one month. your doubt is is there any internal problem if the diastolic is always around 100, even after taking medicines.
The fluctuation could be as the tablet is taken the blood pressure will come down to 100/70. and by evening or night the reading will become 140/100.
For this you can use half the dose in the morning and half in the evening. or you can have a change of the drug.
Regarding the other doubt you can change to some other drug, which will have effect on both systolic as well as diastolic pressure, like
atenolol,
It signifies the effect of internal organs like
kidney, but once the diastolic is maintained at normal the effect wont be there, if it is secondary to the kidney problem then the reading will be still more and corrected when the kidney problem is corrected.
Wishing for a quick and complete recovery.
Best regards.