Flomax (Tamsulosin) and Rapaflo (Sliodosin) are both in the alpha blockers class of medications and both work to relive the symptoms of BPH or enlarged prostate by relaxing the muscles
of the bladder and prostate. Both medications work in the same way, and so both have similar side effects associated with them. To determine which prescription would be most effective for you, talk with your doctor and make sure to tell your doctor all medications you are currently taking as well as your medical history (especially about prostate or other cancers). Though Flomax and Rapaflo are both alpha blockers, they may work differently with individual body chemistry and history, so you may need to try both to find which works best for you. However, always consult your physician before changing your dose or stopping medication.