Final answer:
INH, or isoniazid, is not used for asthma; it is a medication for tuberculosis. Bronchodilators like albuterol and salmeterol are used to treat asthma by relaxing the airway muscles. Epinephrine is used to treat anaphylactic shock by reducing swelling and easing breathing.
Step-by-step explanation:
The drug that is not used for asthma from the list provided is c. INH, which stands for isoniazid, a medication used primarily to treat tuberculosis. For asthma treatment, albuterol and salmeterol are bronchodilators that work by relaxing muscles in the airways to ease breathing, and ipratropium is an anticholinergic that also helps open airways.
To treat asthma by opening airways wider, a sympathomimetic drug such as albuterol or salmeterol could be used, as they mimic the effects of the sympathetic nervous system to relax bronchial smooth muscles. On the other hand, a sympatholytic drug would produce the opposite effect and is therefore not suitable for treating asthma.
For severe allergic reactions such as anaphylactic shock, the drug of choice is epinephrine, which can quickly reduce the symptoms of the reaction, including swelling and difficulty breathing, by causing vasoconstriction and relaxation of smooth muscles in the airways.