Flomax Patient Tips
How it works
Flomax is a brand (trade) name for tamsulosin. Tamsulosin works on alpha receptors to relax muscles in the neck of the bladder and the prostate. This improves urine flow and reduces the symptoms of benign prostatic hyperplasia (BPH).
Flomax is used to treat the symptoms of BPH, also referred to as an enlarged prostate gland.
If you are between the ages of 18 and 60, take no other medication or have no other medical conditions, side effects you are more likely to experience include:
- A runny nose, dizziness, headache, drowsiness, and sexual dysfunction (decreased semen production).
- May cause orthostatic hypotension (a drop in blood pressure when going from sitting to a standing position). This is more likely during Flomax initiation, or when increasing the dose. Vertigo and syncope (temporary loss of consciousness) may also occur.
- Rare cases of priapism (painful erections more than 4 hours in duration) have been reported.
- May not be suitable for people undergoing cataract or glaucoma surgery.
- Rarely, may cause a reaction in people with a sulfa allergy.
Notes: In general, seniors or children, people with certain medical conditions (such as liver or kidney problems, heart disease, diabetes, seizures) or people who take other medications are more at risk of developing a wider range of side effects. For a complete list of all side effects, click here.
- Administer at the same time each day, half an hour after a meal.
- Do not crush, chew or open Flomax capsules.
- Stand up slowly and not in an area where injury is likely if you fall over. Talk to your doctor if you are experiencing a significant drop in blood pressure when you stand up.
- May cause dizziness and affect your ability to drive or operate machinery. Do not drive or operate machinery until you know how Flomax affects you.
- Since BPH and prostate cancer can coexist, talk to your doctor about screening for prostate cancer.
Response and Effectiveness
Peak concentrations are reached within four to five hours when taken on an empty stomach or within six to seven hours when taken with food. May take up to five days before the full effects of Flomax on urine flow are achieved.
Flomax (tamsulosin) [Package Insert]. Revised 01/2016. Boehringer Ingelheim Pharmaceuticals, Inc. https://www.drugs.com/pro/flomax.html
More about Flomax (tamsulosin)
- Side Effects
- During Pregnancy
- Dosage Information
- Drug Images
- Drug Interactions
- Support Group
- Pricing & Coupons
- En Español
- 165 Reviews – Add your own review/rating
- Generic Availability
- Drug class: antiadrenergic agents, peripherally acting
Related treatment guides
- Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Flomax only for the indication prescribed.
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