Atenolol side effects
Pro Research Analysisby 
Searched over 200M research papers
Central Nervous System (CNS) Side Effects of Atenolol
Atenolol, a hydrophilic beta-blocker, is associated with a very low incidence of central nervous system (CNS) side effects such as sleep disturbances, vivid dreams, nightmares, hallucinations, and memory issues. Studies comparing atenolol to more lipophilic beta-blockers like metoprolol and propranolol consistently show that atenolol causes fewer CNS-related side effects. Patients who switched from lipophilic beta-blockers to atenolol reported significant improvements in sleep quality, concentration, memory, and anxiety, with no significant CNS side effects observed after starting atenolol Ca1983Cove-Smith1985Mcainsh1990. Compared to metoprolol, atenolol was associated with fewer sleep disturbances and restless nights . Psychological effects such as reduced arousal have been noted, but atenolol does not significantly affect anxiety levels .
Metabolic and Glycemic Side Effects of Atenolol
Atenolol can affect metabolic parameters, particularly insulin and blood glucose levels. Research shows that atenolol use is linked to disturbances in insulin levels and can cause hyperglycemia in hypertensive patients. This effect is observed whether atenolol is used alone or in combination with other antihypertensive drugs, while other antihypertensive drugs do not show the same impact on insulin levels Siddiqui2023Siddiqui2023. Long-term use of atenolol has been associated with a higher incidence of hyperglycemia compared to other non-diuretic antihypertensive drugs, although no cases progressed to diabetes mellitus. Regular monitoring of blood glucose is recommended during atenolol treatment to avoid long-term metabolic complications .
Hepatic Side Effects of Atenolol
Although atenolol has been reported to potentially cause hepatic dysfunction, studies measuring liver enzyme levels (specifically ALT) in patients taking atenolol found no significant changes. This suggests that while hepatic side effects are possible, they are not commonly reflected in elevated ALT levels, and further research is needed to clarify atenolol’s impact on liver function .
Side Effects in Pediatric Use (Infantile Hemangiomas)
In infants treated for hemangiomas, atenolol has shown a favorable safety profile. The most common side effects reported were mild, such as diarrhea, agitation, and sleep disturbances. Serious side effects like hypoglycemia, bronchospasm, bradycardia, or hypotension were not observed. Compared to propranolol, atenolol was associated with fewer severe side effects, making it a potentially safer alternative for pediatric use Ji2016De Graaf2013.
Conclusion
Atenolol is generally well tolerated with a low risk of CNS side effects, especially compared to more lipophilic beta-blockers. Its main side effects are related to metabolic changes, particularly disturbances in insulin and blood glucose levels, and mild gastrointestinal or sleep-related symptoms in pediatric patients. Hepatic side effects appear to be rare or not easily detected through standard liver enzyme tests. Regular monitoring of metabolic parameters is advisable during atenolol therapy, especially for long-term use.
Sources and full results
Most relevant research papers on this topic