You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which drug is not used for acute bronchial asthma ? and explain in detail?
Ans. is 'a' i.e., Salmeterol Bambuterol is a prodrug of terbutaline. It is slowly hydrolysed by pseudocholineterase. Sho acting 132-agonists produce bronchodilatation within 5 min and action lasts for 2-6 hrs --> are used to abo and terminate acute asthma, but are not suitable for prophylaxis. Salmeterol is delayed acting, can be used for prophylaxis only, while formoterol is fast acting and long acting can be used for both prophylaxis and acute attack.