Tamsulosin Hydrochloride

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Medically reviewed by: Samuel Maaiah, PharmD

Last updated on October 15, 2021

Dr. Maaiah is a PharmD graduate who has practiced both in pharmaceutical consulting and retail pharmacy. His interests include consulting and the development and approval of new therapeutics. He currently works as a Medical Information Consultant (MIC) and as a retail pharmacist. As a MIC he helps pharmaceutical companies with projects and by consulting as a medical information expert.

When Dr. Maaiah is not working, he enjoys spending time with his family and friends, doing outdoor activities, working out, and reading.


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How to buy Flomax (Tamsulosin) online?

To order Flomax, call 1-800-828-4489 and speak to customer support or order online through 90daymeds.com. Use the chat feature for customer support. Visit the “How to Order” page on 90daymeds.com for more information.

Is a prescription required?

Yes, a valid prescription from your doctor is required to obtain Flomax . Flomax is a prescription medication which can only be sold with a prescription. You will need to provide a prescription to process your order. The prescription can be faxed (1-800-416-8019), emailed , or uploaded . Alternatively, we can reach out to your doctor to obtain a valid prescription if you would like.

What is the maximum amount that can be ordered?

A 90-day supply is the maximum amount that can be ordered at one time. Refills are kept on file for future orders. The amount that can be ordered is based on the directions and authorized quantity indicated on the prescription from your provider.

Is it safe to order Flomax (Tamsulosin) from 90-Day Meds?

Absolutely. We operate just like your local pharmacy would, with our main priority being to provide you access to safe and affordable prescription medications. Each of our partner pharmacies are fully licensed and certified in their respective countries. We ensure that your shopping experience is safe and secure with our Norton Shopping Guarantee.

Flomax Cost

Average US Retail Price 90-Day Meds Price
Flomax 0.4mg
(90 capsules)
(90 capsules)
Tamsulosin 0.4mg
(90 capsules)
(90 capsules)

How much does Flomax (Tamsulosin) cost?

At 90DayMeds.com, we make sure to keep drug prices low. You can view the Flomax cost savings below:

We provide brand and generic Flomax 0.4 mg capsules here at 90-Day Meds. A quantity of 90 capsules of brand Flomax costs $165, which comes out to $1.83 per unit. A quantity of 90 capsules of generic Flomax costs $33, which comes out to $0.37 per unit.

Below shows the price comparison of brand and generic Flomax 0.4 mg capsules at a quantity of 90 capsules between the average U.S. retail price and 90-Day Meds price.

What is the lowest price of Flomax per unit?

Lowest Price Per Unit: $0.23/unit for generic Flomax (Tamsulosin) 0.4 mg capsules.

Is this price for Flomax without insurance?

The listed prices are without insurance. Unfortunately, we cannot accept insurance. However, we will provide you with an official receipt which you can use to apply for reimbursement with your insurer. We are also unable to adjudicate with US insurance providers.

Why is Flomax cheaper from Canada than from the United States?

Drug prices are negotiated and regulated in Canada. Because the US is a free market economy, the price differs since pharmaceutical suppliers can charge what they deem appropriate for the product. As a result, we can offer lower prices to our patients as we supply medications from these countries.

Flomax Coupon

Sorry, we do not have a Flomax (Tamsulosin Hydrochloride) coupon at the moment, please check back later.

Yes, Check out the Coupon Section of this page.


Is there a lower cost generic Flomax available?

Flomax is available as a generic alternative.

How much cheaper is generic Flomax?

Generic Flomax (Tamsulosin) is $132 cheaper than brand Flomax at a quantity of 90 capsules.

What is the difference between brand and generic Flomax?

There is no difference between generic and brand Flomax. Generic formulations of medications contain the same active ingredients and meet the same quality, strength, and purity standards as the brand formulation.


Is shipping available to the United States?

Yes. An email notification will be sent to you once the item has been shipped. We ship nationwide across the United States.

How much does shipping cost?

There are no standard shipping fees.

Is express shipping available?

If a product of Canada is available then express shipping can be selected with an estimated delivery time of 3-5 business days. You have the option at the checkout page to select the express shipping option ($25) if available for that medication source.

Refill RX

How to refill a prescription?

Refilling your prescription is simple with 90-Day Meds. To see which prescriptions we have on file, please sign into your account and view your previous orders. Placing a refill order online is made easy by accessing the reorder section in your account. The live chat is also a great place to connect with us to place a refill order while you are on the go. You may also call us and speak to customer support to place a refill.

Are prescriptions automatically refilled?

Prescriptions are not automatically refilled since there may be cases where you are no longer taking the medication, your doctor has changed your dose, etc. However, we provide a friendly refill reminder service. We will kindly notify you by phone or email when it is time to place a refill order based on your prescription fill history.

Drug Information


What is Flomax ?

Flomax is a prescription medication that is classified as an alpha-1 adrenoceptor antagonist.


What is Flomax used for?

It is used to treat benign prostatic hyperplasia (BPH).

How does it work?

Inhibiting alpha-1 adrenoreceptors improves the urine flow rate and symptoms related to BPH as these receptors are located in the smooth muscle of the bladder neck and prostate. The antagonistic effect of flomax on these receptors causes the smooth muscle to relax and improve BPH.


How do I take Flomax ?

Flomax should be taken as directed by your doctor generally, 30 minutes after the same meal every day. Flomax capsules should not be opened, crushed, or chewed as this can affect the way this drug works in your body.

What dosages are available?

Flomax is available as brand and generic 0.4 mg capsules.

What is the recommended dosage?

It is typically dosed 0.4 mg once daily but take as directed by your doctor.

What is the maximum dosage?

The maximum recommended dosage is 0.8 mg/day.

What if I miss a dose?

Take the missed dose as soon as you remember unless it is close to the time you are due for your next dose. If that is the case, just wait until it is time for your next dose. Do not double your dose to compensate for your missed dose. If you forget to take your dose for several days, let your doctor know before taking a dose.


What should you know before you take Flomax ?

This medication can cause dizziness when abruptly going from lying down to sitting up or standing which may result in injuries such as falls and loss of consciousness (syncope).

Avoid concomitant use with strong CYP3A4 inhibitors and use caution when used concomitantly with moderate CYP3A4 inhibitors and moderate or strong CYP2D6 inhibitors. Also use caution when using concomitantly with CYP2D6 poor metabolizers and other CYP P450 inhibitors.

Do not use with other alpha adrenergic blocking agents.

If you have an erection lasting hours or an erection present that was not caused by sexual stimulation, seek medical attention.

Use with caution in patients also taking warfarin.

Let your ophthalmologist know you are taking Flomax if you require eye surgery as Intraoperative Floppy Iris Syndrome has been reported while taking this medication.

Receive prostate cancer screenings at baseline and periodically while you are on treatment.

Side Effects

What are the side effects of Flomax?

Some common side (≥2%) effects include:

  • Headache
  • Dizziness
  • Rhinitis
  • Infection
  • Abnormal ejaculation
  • Asthenia
  • Back pain
  • Diarrhea
  • Pharyngitis
  • Chest pain
  • Increased cough
  • Somnolence
  • Nausea
  • Sinusitis
  • Insomnia
  • Decreased libido
  • Tooth disorder
  • Blurred vision

Speak to your doctor for a full list of side effects.


Does this medication interact with other drugs, foods, or alcohol?

When used with PDE-5 inhibitors, there is a potential for symptomatic hypotension

Avoid concomitant use with strong CYP3A4 inhibitors

Use caution when used concomitantly with moderate CYP3A4 inhibitors and moderate or strong CYP2D6 inhibitors

Use caution when using concomitantly with CYP2D6 poor metabolizers and other CYP P450 inhibitors


How should this medication be stored?

Keep Flomax in the original container and store it in a dry place at room temperature 15-30°C (59-86°F).

Pharmacist Tips

  • If you begin to feel dizzy while taking Flomax, sit down to avoid injuring yourself and report this symptom to your doctor at your next follow-up visit.
  • Take your first dose of Flomax after you are done driving for the day to see how this medication affects you.
  • Always let your doctor know when you start any prescription or over-the-counter medications as Flomax has many drug interactions.
  • This medication works best if you take it at least 30 minutes after the same meal every day and if you minimize missing doses. Let your doctor know if you missed a dose for several consecutive days as they may want to taper you back to your dose if you are at a higher Flomax dose.


Does Flomax make you pee more?

This medication can indirectly cause you to pee more as it relaxes the smooth muscles of the bladder neck and prostate which make it easier for urine to flow.

Why is flomax taken at night?

It is typically taken by patients at night as it may cause symptoms of dizziness, sudden drop in blood pressure, and possible fainting. Patients choose to take their dose at night since it is typically when they are done driving or operating machinery for the day.

How long does Flomax take to work?

This medication works best if you take your dose every day and minimize missing doses. Patients have reported improvement in BPH symptoms within 2 to 4 weeks of taking Flomax.

How long can you stay on Flomax?

In clinical trials, efficacy was seen in patients for up to 6 years.

Does Flomax hurt your kidneys?

There are no dose adjustments required for patients with a creatinine clearance greater than 10 mL/min and/or end-stage renal disease (ESRD).


This information is not individual medical advice and does not substitute for the advice of your health care professional. Always ask your health care professional for complete information about this product and your specific health needs before taking any medication.