A 27-year-old male asked:
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i've been on atenolol 25mg daily split dose for 3 months. works well for me. how long after i take the pill does it start actually reducing hr and bp?

2 doctor answers
Dr. John Michel
46 years experience Family Medicine
Almost immediately: The pill works shortly after it has been taken even the first time. This will begin working within the first day but may take another day for some to be in your system. This is a long acting med and some is doing something most of the time.
Answered on Apr 4, 2015
Dr. Robert Henson
32 years experience Cardiology
Few days: the lion's share of the effect should plateau in a few days to a week.
Answered on Jan 1, 2018
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A 27-year-old male asked:
Dr. Rishi Vohora
19 years experience Cardiology
Yes: In fact based on atenolol' half life it is often more effective taken twice a day.
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Time frame: up to 1 hour, depending on your metabolism.
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Dr. Volkan Tuzcu
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Heart rate : Most likely it is OK but maybe better to ask your doctor

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