Hello, whats her recent bp reading? Try checking her bp in Three positions- sitting, standing, sleeping and then keep a track of it.
Coming to Divyamukta vati- its a safe drug but you gotta choose right dosage, give her 1 tablet before breakfast, Observe how it goes with her, for further help...
Next Steps
You can consult me through Practo, there are wind range of medicines for Hyper tension, I would be Happy to help you...
Health Tips
Ask your mother to reduce stress, get some good sleep, practice meditation and pranayama!
I wish her good health!Thank you ...