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I take tenormin which is a beta blocker, I take it to slow my heart rate down and prevent the palpitations that you described. It actually from what my doctor told me, Blocking beta receptors can cause decreased heart rate; decreased force of heart contractions; bronchoconstriction (can cause asthma attacks in people with asthma); uterine contractions; decreased blood pressure; relief of migraines; and decreased tremor.
The beta receptors found in the different areas of the body are not all the same, thus different beta blockers may affect these areas differently. For instance, metoprolol (Lopressor) and atenolol (Tenormin) are beta-1 selective, which means they block only beta-1 receptors found primarily in the heart, but not the beta-2 receptors found in the lung and uterus. Thus, they can decrease blood pressure, heart rate and force of cardiac contraction, but are less likely to cause bronchoconstriction and uterine contractions. This selectivity is not absolute and depends on the dose
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