Different Forms of Theophylline. There are many different theophylline products available, and most are not equivalent to each other. There are short-acting and long-acting tablets and capsules, as well as a theophylline elixir. An injectable form of the medication is also available.Along with many different generic theophylline products, the following brand-name theophylline medications are also available:ifferent Forms of Theophylline. There are many different theophylline products available, and most are not equivalent to each other. There are short-acting and long-acting tablets and capsules, as well as a theophylline elixir. An injectable form of the medication is also available.
1 Î· ring (eta) â Has components that resemble the delta ring. 2  It was evident during the plane-crossing event in 2007 when the Î· ring became the 2nd brightest ring. 3  Î± and Î² rings (alpha and beta) â These two rings are second only to the Îµ ring in terms of brightness.
Six rings have been observed in the system, which are best described as faint and tenuous. The rings are very dark, and are likely composed by organic compounds processed by radiation, similar to that found in the rings of Uranus. Much like Uranus, and Saturn, four of Neptuneâs moons orbit within the ring system.