Give the reason why non selective bets blocker are contraindicated in asthma????????

Non-selective beta blockers are contraindicated in asthma because they can cause bronchoconstriction, which can worsen asthma symptoms and potentially lead to a severe asthma attack. Beta blockers work by blocking the effects of adrenaline on the heart and blood vessels, but they can also block the effects of adrenaline on the lungs, leading to narrowing of the airways and difficulty breathing. This can be particularly dangerous for individuals with asthma, as it can exacerbate their already compromised lung function. Therefore, non-selective beta blockers should be avoided in individuals with asthma to prevent worsening of their condition.