Divya Muktawati is good medicine for controlling blood pressure . But like every other medicine (ie allopathic ) for bp it has side effects too. I too mukta vati for some time and I noticed following side effects.
1. nasal congestion , you will your nose is blocked specially when u trying lay down in bed.
2. The other side effect which i notice after taking muktawati for long time (over 1 year) . It makes your body very sensitive to cold. I remember earlier i can easily face cold upto 2- 3 degrees without getting any trouble . But after taking muktawati my body became very sensitive and i feel to shiver even at 10 degree which is not that tough cold. It will make your body more sensitive to cold.
For mostly people the dosage advised (ie 2 tablets in morning , empty stomach) , i feel is very high. For starting this dosage is okay . But after few days reduce it to 1 tablet at morning and than after few days reduce it to 1/2 tablet daily.
To my experience, only half tablet in morning is good enough to control your blood pressure . With that one must do pranayam and other exercise to get rid of nasal congestion and cold sensitivity problem.
Remember ayurvedic medicine are different from allopathic medicines. So they cant be just taken in same way. Ayurveda medicine always require supportive lifestyle modification to make it work effectively. But its definitely more safer than allopathic medicines.