Medically reviewed by Jessica Swirble, PharmD
Last updated on April 18, 2025
Drug Information | Side Effects | Use & Dosage | Request an Online Prescription
Tamsulosin is a prescription medication used to treat symptoms of an enlarged prostate, also known as benign prostatic hyperplasia or BPH.
Tamsulosin is prescribed to treat symptoms of an enlarged prostate, also known as benign prostatic hyperplasia (BPH). BPH can cause urinary symptoms such as bladder retention (difficulty emptying your bladder), painful urination, and difficulty with urination. Tamsulosin helps reduce these symptoms by relaxing muscle tissue in the bladder and prostate.
Tamsulosin belongs to a class of drugs known as alpha-blockers. Alpha-blockers prevent certain muscles from tightening, meaning that the smooth, involuntary muscles in the bladder and prostate stay relaxed. This helps to reduce urinary retention and improve symptoms of benign prostatic hyperplasia, such as frequent urination, difficulty starting urination, and weak urine stream.
Tamsulosin is available as an oral capsule.
The dosage and frequency of use depend on the condition being treated, its severity, and how you respond to the medication.
Follow your healthcare provider's instructions regarding dosage and schedule. Do not exceed the prescribed dose or frequency of use without consulting your provider.
Tamsulosin is used to manage benign prostatic hyperplasia (BPH). The effects can be noticeable within a few days, but it may take up to several weeks to achieve desired relief from symptoms.
Continue using tamsulosin as prescribed, even if you start feeling better. Regular use according to your prescription is crucial for the management of your condition.
While tamsulosin is primarily used for treating BPH, healthcare providers may prescribe it off-label for other conditions.
Discuss any alternative uses of tamsulosin with your healthcare provider.
Tamsulosin is available in the following dosage forms:
Tamsulosin is a prescription medication. You must have a valid prescription from a licensed healthcare provider to obtain it.
The use of tamsulosin can lead to various side effects in some individuals.
Common mild side effects of tamsulosin use include:
More severe side effects include:
If you experience any severe or concerning side effects while taking tamsulosin, contact your healthcare provider right away.
Inform your healthcare provider about any existing medical conditions, allergies, or other medications you are taking before starting treatment with tamsulosin. This includes prescription drugs, over-the-counter medications, and dietary supplements, as they may interact with tamsulosin.
Tell your provider if you are taking these medications or supplements:
You should also mention medical conditions such as:
If you are pregnant, planning to become pregnant, or breastfeeding, discuss the potential risks and benefits of using tamsulosin with your healthcare provider.
Take tamsulosin exactly as prescribed by your healthcare provider. Do not exceed the recommended dose or duration of treatment.
Your provider may direct you to take tamsulosin 30 minutes after the same meal each day (i.e., breakfast or dinner).
Complete the full course of treatment, even if you feel better, to ensure the medication's effectiveness in managing your condition.
In case of a tamsulosin overdose, seek medical attention immediately. Symptoms of overdose may include severe dizziness, fainting, or a rapid heartbeat. If you suspect an overdose, contact the poison control helpline at 1-800-222-1222 or call emergency services.
Tamsulosin is available in the following forms:
The typical starting dose of tamsulosin varies depending on the condition being treated, the severity of symptoms, and individual patient factors. It is crucial to follow your healthcare provider's instructions regarding dosage and administration.
For benign prostatic hyperplasia (BPH):
The dosage may be adjusted based on the response and tolerance to the medication. Your healthcare provider will determine the most appropriate dose based on your medical history and your response to the medication.
Tamsulosin should be taken as prescribed by your healthcare provider. Do not exceed the recommended dose or duration of treatment without consulting your provider.
If you have any questions about your dosage or need adjustments, contact your healthcare provider for guidance. If you want to talk to a provider right away, consider scheduling an online doctor appointment through a telehealth platform like Sesame.
If you miss a dose of tamsulosin, take it as soon as you remember unless it is close to the time for your next scheduled dose. In that case, skip the missed dose and continue your regular dosing schedule. Do not double the dose to make up for a missed one.
Take tamsulosin around the same time every day to maintain a consistent amount of medication in your body.
Continue taking tamsulosin as prescribed by your healthcare provider, even if you start feeling better. It's important to keep taking the medication as directed to manage your condition effectively.
Do not suddenly stop taking tamsulosin; this can cause your symptoms to return.
If you have any concerns or questions about your medication, discuss them with your healthcare provider for medical advice and recommendations.
Store tamsulosin according to the instructions provided by your healthcare provider or pharmacist. Keep it at room temperature, away from light and moisture. Ensure the container is tightly closed and out of reach of children.
Do not use expired medication or medications that appear damaged or discolored. If you have any questions about storage, consult your healthcare provider or pharmacist for guidance.