Which of the following is a side effect of Tenormin?

Tenormin, or atenolol, is a beta-blocker commonly used to treat high blood pressure and other heart-related conditions. One of its known side effects is hypotension, which refers to abnormally low blood pressure. This occurs because the primary action of beta-blockers is to decrease the heart rate and force of contraction, leading to a reduction in overall cardiac output and, subsequently, blood pressure.

Monitoring blood pressure while on this medication is crucial, as excessive drops in blood pressure can lead to symptoms like dizziness or fainting. Understanding this side effect helps in the safe administration and monitoring of patients taking Tenormin, ensuring that healthcare providers can address any issues related to low blood pressure promptly.

The other options mentioned, while they may be associated with other medications or health conditions, are not typical side effects linked directly to atenolol. Insomnia, severe headaches, and involuntary movements can occur with various drugs but are not closely associated with Tenormin’s pharmacological profile.