Precautions and Warnings With Tamsulosin

There are several precautions and warnings with tamsulosin to be aware of, including potential allergic reactions and sexual side effects. Be sure to talk to your healthcare provider if you have any allergies or if you are pregnant or breastfeeding. It is also important to tell your healthcare provider about all of the medications you are taking, including prescription and non-prescription medications, vitamins, and herbal supplements.

Tamsulosin: What Should I Tell My Healthcare Provider?

You should talk with your healthcare provider prior to taking tamsulosin hydrochloride (Flomax®) if you have:
 
  • Any allergies (especially a sulfa allergy), including allergies to foods, dyes, or preservatives.
     
Also, let your healthcare provider know if you are:
 
  • Pregnant or thinking of becoming pregnant
  • Breastfeeding.
     
It's important to also tell your healthcare provider about all of the medicines you are taking, including prescription and non-prescription medicines, vitamins, and herbal supplements.
 

Some Tamsulosin Warnings and Precautions

Some tamsulosin warnings and precautions to be aware of include:
 
  • Tamsulosin can cause dizziness, a spinning sensation (vertigo), and fainting, especially when first standing up. These side effects are caused by low blood pressure. These symptoms are more common when tamsulosin is first started or when the tamsulosin dosage is changed. If you are experiencing any of these symptoms, be sure to avoid situations that might be dangerous, such as driving or operating heavy machinery. Tell your healthcare provider if you are having trouble with any of these symptoms.
     
  • Very rarely, tamsulosin has been reported to cause priapism, a painful erection of the penis that does not go away. Even though it may seem embarrassing, you need to seek medical attention right away if you have priapism, as it made lead to permanent damage to the penis.
     
  • Before you start tamsulosin, your healthcare provider should make sure your enlarged prostate symptoms are not caused by another condition, such as prostate cancer or bladder problems.
     
  • Tamsulosin has been reported to cause intraoperative floppy iris syndrome, a problem with the eyes that can occur during cataract surgery. This problem has occurred in both people who were currently taking tamsulosin and people who had stopped taking tamsulosin. Before having eye surgery, be sure to tell your healthcare provider if you are or have been on tamsulosin.
     
  • Although it is very rare, people who have a sulfa allergy might also be allergic to tamsulosin. If you have a sulfa allergy that has caused severe or life-threatening reactions in the past, talk with your healthcare provider before taking tamsulosin.
     
  • Tamsulosin is considered a pregnancy Category B medication. This means that tamsulosin is probably safe for use during pregnancy. However, because tamsulosin has not been studied in pregnant women, the full risks of using tamsulosin during pregnancy are not known. It is also important to note that tamsulosin is not approved for any use in women (see Flomax and Pregnancy for more information).
     
  • It is not known if tamsulosin is passed through the breast milk. Therefore, be sure to tell your healthcare provider if you are breastfeeding or plan to start breastfeeding.
     
  • Tamsulosin can interact with certain medications (see Drug Interactions With Tamsulosin).
     
The Dirty, Messy Part of BPH

Tamsulosin Hydrochloride

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