Why do I feel worse since starting it?
Early tiredness is expected and usually settles within a month. In heart failure, a temporary dip is part of how the drug works — the benefit comes later and is substantial.
Can I take it with asthma?
Often yes, cautiously, because it is cardioselective — but not with severe or unstable asthma. Report any new wheeze.
My pulse is in the 50s. Is that a problem?
A slower pulse is the drug working. Below 50, or with dizziness, blackouts or breathlessness, seek review.
Can I drink alcohol?
Moderate alcohol is generally fine, though it adds to dizziness, especially early on.
Can I exercise?
Yes, and you should — but your maximum heart rate will be lower, so judge effort by how you feel rather than by a heart rate target.