For years, a certain 'little blue pill' was the talk of the town, but today, Hollywood is focused on a different one: propranolol. Originally developed to treat heart conditions, this beta blocker is rapidly moving into dressing rooms, award ceremonies, and even first dates as a popular fix for anxiety. Prescriptions are soaring, with data showing a 28 percent increase since 2020.

Why celebs are reaching for the 'Chill Pill'

Propranolol has long been used by actors and musicians before performances. Recently, however, a new generation of stars has brought it into the mainstream. At red carpet events, actors like Kristen Bell, Natasha Rothwell, and Rachel Sennott have spoken about taking beta blockers. Robert Downey Jr. even joked that taking one made the Golden Globes "a breeze". The trend gained wider public notice after Khloe Kardashian admitted borrowing her mother’s anxiety pills.

This discussion has spilled over onto social media and popular podcasts, increasing public interest. Users are turning to propranolol for performance anxiety in high-stress situations, such as delivering presentations or walking down the aisle at a wedding. Many users report that the pill is a "total game-changer" and helps them relax and perform well without the typical physical reactions to stress.

How this heart drug stops anxiety

Propranolol is part of a drug class called beta blockers, first developed in the 1960s to treat high blood pressure and irregular heart rate. They help anxiety by tackling the body's physical response to stress.

When a person feels anxious, adrenaline is released, which causes the body's fight-or-flight symptoms, such as sweating, trembling hands, and a rapid heartbeat. Propranolol works by blocking the effects of adrenaline at specific sites called beta receptors. By attaching to these receptors in the heart, the drug slows the heart rate and weakens heart contractions, thereby reducing the physical symptoms of anxiety. The drug also affects beta receptors throughout the body, including the brain, which contributes to the reduction in anxious feelings.

The doctor's verdict on safety

A major appeal of propranolol is that, unlike older anti-anxiety drugs such as Valium, it is considered nonaddictive and has a low risk of dependence, as it doesn't cause sedation or euphoria. Doctors see it as a low-risk option, particularly for short-term use, or for patients waiting for other treatments like counseling.

However, the drug is not without risk. Common side effects include vivid dreams, fatigue, dizziness, and cold hands or feet. More severe, though rare, risks include allergic reactions and heart failure.

Critically, propranolol can be dangerous for people with pre-existing conditions. Individuals with diabetes or asthma must consult a doctor, as the medication is often unsuitable and can mask early symptoms of an attack. Furthermore, there are growing concerns over misuse and overdose. Propranolol overdose can slow the heart down excessively, lead to seizures, or cause breathing difficulties. U.K. regulators have advised pharmacists to be careful about overdose risks, even recommending prescribing smaller quantities.

Experts caution that while propranolol may stop hands from shaking during a speech, it only targets the physical response and does not address the underlying psychological causes of persistent worry. For long-term anxiety, psychological therapies and antidepressants are the initial recommended approach in UK guidelines