What are the best asthma pills?

None: No such thing. There are no 'asthma pills'

Not typical: Asthma is typically treated with a few varieties of inhaled medication, either by MDI device or nebulizer. Singulair (montelukast) is a pill which is indicated for allergy relief, and is helpful in reducing asthma symptoms in some people. It does nothing to help someone who is actively wheezing.

Each to his own: At least one study showed that nearly every case of asthma is unique in medication response and thus what is best is what works best for you. Inhaled steroid is the currently preferred drug, yet only about 50% of asthma actually responds to inhaled steroid. . As for pills, the only one I am aware of is Singulair (montelukast) or Accolate. Theophylline or terbutaline are rarely used nowadays.