Drug Interactions With Tamsulosin

As with any medication, there are potential drug interactions with tamsulosin. Taking tamsulosin with other medications, such as other alpha blockers, warfarin, or cimetidine, can increase your risk of side effects, such as dangerously low blood pressure.

An Overview of Drug Interactions With Tamsulosin

Tamsulosin hydrochloride (Flomax®) can potentially interact with many drugs. Some of the drugs that may lead to interactions with tamsulosin include:
 
  • Other alpha blockers similar to tamsulosin, including:

 

 
  • Certain antibiotics or antifungals, including:

 

    • Clarithromycin (Biaxin®)
    • Erythromycin (Ery-Tab®)
    • Isoniazid (Nydrazid®)
    • Itraconazole (Sporanox®)
    • Ketoconazole (Nizoral®)
    • Miconazole
    • Telithromycin (Ketek®)
 

 

 
Other medications that are very similar to tamsulosin can interact with medications known as phosphodiesterase type 5 inhibitors (PDE5 inhibitors), including avanafil (Stendra™), tadalafil (Cialis®, Adcirca®), vardenafil (Levitra®, Staxyn™), and sildenafil (Viagra®, Revatio®). Although tamsulosin does not seem to interact with these medications, caution should be taken when combining these medications (see Combining Levitra with tamsulosin for more information).
 
Men and Osteoporosis

Tamsulosin Hydrochloride

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