Dear Radha,
Beta-blockers do NOT lead to a higher blood pressure. All i can say is that your BP is likely shooting up due to the underlying reason fo ryour High Blood pressure, that means that your BP is inadequately controlled. Sometimes when a drug is NOT effective then your BP may still keep on increasing even after trying a higher dose, adn this may be happening in your case.
A different BP medicine (like ACE inhibitors/ diuretics) or acombination may be helpful in your case to control your BP.
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regards
Dr. Gupta