Excuse my spelling there *bisoprolol.
Hi,
Bisoprol is a type of beta-blocker so it's main actions are to reduce the workload of the heart and lower the blood pressure so some people can experience dizziness (especially when standing up) due to a temporary lack of blood to the brain. Another side effect is precipitating an asthma attack if your mother suffers from this problem. A very rare side effect is mild sedation.
Hope this helped.