Can Blood Clots In Brain Be Cured?

Dear Drs; on last sunday morning when my father (62Yrs old) woke up; he cannot drink or eat anything. We admitted him in a hospital. After the MRI scanning, the doctors told us that there are few blood cloats in his brain. His BP is 170now; Doctors says first they have to reduce the BP; then only they can strat the treatment. Is it ok? Is the cloat can be cured.? How long the treatment will take; Kindly advise.