Floprost-MR

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Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Floprost-MR

Property Description
Active ingredient Tamsulosin Hydrochloride
Form Modified-Release (MR) Capsule
Pharmacological class Alpha-adrenergic receptor antagonist
Common use Easing urinary symptoms
Origin Synthetic

What Type of Medicine is Floprost-MR?

Floprost-MR is a synthetic, prescription-only medicinal product containing the single active compound, Tamsulosin Hydrochloride. Pharmacologically, it is classified as an alpha-adrenergic receptor antagonist, specifically an alpha blocker, which is clinically recognized for its unique and highly selective alpha1A-adrenoceptor antagonist action.

This drug entity is part of the sulfonamide derivative class and is widely used in urological care. Its high selectivity for the alpha1A receptor results in a targeted effect primarily on the smooth muscle tissue of the prostate. This characteristic differentiates it from older, less selective alpha blockers, ensuring a more focused action on the lower urinary tract.

What Does the Modified-Release (MR) Capsule Mean?

Floprost-MR is administered via the oral route as a Modified-Release (MR) capsule, which is a specialized dosage form designed for sustained delivery. The MR designation confirms that the Tamsulosin Hydrochloride is released gradually and consistently over a full 24-hour period.

The purpose of this controlled mechanism is to ensure stable therapeutic drug levels are maintained continuously, which is medically recognized to support consistent symptom management throughout the day and night. The modified-release formulation of Tamsulosin is intended to be taken once daily. The capsule contains the active ingredient along with pharmaceutical excipients that govern this precise release rate.

What is the General Purpose of Floprost-MR?

The general purpose of Floprost-MR is to address urinary difficulties by promoting muscle relaxation in the bladder and prostate area. The medication's physiological action is to selectively induce the relaxation of smooth muscle tissue within the prostate gland and the neck of the bladder. This action reduces urinary outflow resistance, which consequently leads to an overall improvement in urine flow.

Regulatory References

  1. Tamsulosin: MedlinePlus Drug Information

What side effects are possible with Floprost-MR?

Floprost-MR: Possible Side Effects and Safety Information

Floprost-MR (tamsulosin hydrochloride) is generally well-tolerated, but like all medications, it can cause side effects. Most side effects are mild to moderate and may diminish as your body adjusts to the medication. It is essential to discuss all medical conditions and current medications with your healthcare provider before starting treatment.


Common Side Effects

The most frequently reported side effects (occurring in 1% or more of patients) often include:

  • Dizziness or lightheadedness, particularly when standing up quickly (orthostatic hypotension).
  • Abnormal ejaculation, such as a decrease in semen or ejaculation failure.
  • Headache.
  • Infection symptoms, such as a stuffy or runny nose (rhinitis) or sore throat.
  • Back pain.

Serious Side Effects and Warnings

Seek immediate medical attention if you experience any of the following serious, though rare, side effects:

  • Priapism: A painful erection lasting longer than four hours. If untreated, this can cause permanent damage.
  • Severe Allergic Reaction: Symptoms include swelling of the face, lips, tongue, or throat; difficulty breathing; or severe skin reactions (e.g., rash, blistering, or hives).
  • Fainting (syncope) or severe dizziness.

Caution for Eye Surgery: Inform your ophthalmologist if you are taking Floprost-MR before undergoing cataract or glaucoma surgery, as it can lead to a complication called Intraoperative Floppy Iris Syndrome (IFIS), which may require adjustments to the surgical technique.

Blood Pressure: Since Floprost-MR can lower blood pressure, it should be used with caution in patients already on blood pressure medication or other alpha-blockers.

Overdose and Emergency Response

️ Overdose and When to Seek Help

An overdose of Floprost-MR (Tamsulosin Hydrochloride) may result in severe manifestations due to the drug’s profound effects as an alpha-adrenergic receptor antagonist.

Documented Manifestations

The most significant clinical sign documented in official regulatory labeling is acute hypotension (low blood pressure). Reported clinical presentations in acute overdosage cases may also include symptoms such as headache, vomiting, and diarrhea.

Emergency Response and Required Actions

In all suspected cases of overdose, immediate medical attention must be sought. Official guidelines state that support of the cardiovascular system is of first importance. Initial stabilization includes restoring blood pressure and normalizing heart rate by placing the individual in the supine position (lying down). If low blood pressure persists, further hospital measures may be required, including the administration of intravenous fluids or vasopressors.

Supportive Measures

Regulatory documents advise that general supportive measures should be applied, including monitoring renal function. For cases involving the ingestion of large quantities, procedures such as gastric lavage or the administration of activated charcoal may be considered to impede absorption. However, due to the drug’s high protein binding, the regulatory literature notes that dialysis is unlikely to be of benefit. No specific pharmacological antidote is documented in the official regulatory prescribing information.

Therapeutic Uses of Floprost-MR

Quick Facts

  • Therapeutic Domain: Benign Prostatic Hyperplasia (BPH).
  • Primary Use: Management of lower urinary tract symptoms (LUTS).
  • Benefits: Helps relieve difficulty with urination, urinary urgency, and frequent urination.

What Floprost-MR Treats: Main Uses and Benefits

Floprost-MR is primarily indicated for the treatment of signs and symptoms associated with Benign Prostatic Hyperplasia (BPH), a common condition in men involving an enlarged prostate gland. The medication aids in the management of LUTS, or lower urinary tract symptoms, caused by the prostate’s enlargement.

The therapeutic action helps relieve the challenging symptoms of BPH by facilitating urinary flow. Specific benefits of using this medication include addressing issues such as a weak or interrupted urinary stream, the sensation of incomplete bladder emptying, difficulty starting urination (hesitancy), and the need to urinate frequently, particularly during the night (nocturia).

This pharmaceutical approach provides symptom relief and improves the overall quality of life for individuals dealing with BPH.

Eligibility and Restrictions for Use

Eligibility and Contraindications

Floprost-MR is officially restricted to adult males (18 years and over) for its labeled indication. Eligibility is determined by strict criteria outlined in regulatory documents, which establish groups who are permitted to use the medicine and those who are absolutely prohibited.

Absolute Contraindications

Use of Floprost-MR is contraindicated in several populations, including women (as the drug is not indicated for female patients) and the pediatric population (under 18 years), where safety and efficacy are not established. Absolute prohibitions also apply to:

  • Patients with known hypersensitivity to the active ingredient.
  • Patients with a history of orthostatic hypotension.
  • Patients with severe hepatic insufficiency.

Restricted and Conditional Use

Regulatory labeling requires caution or restricts use in other specific contexts. This includes patients with severe renal impairment (Creatinine Clearance < 10 mL/min), for whom clinical data is limited. Initiation of therapy is not recommended for patients with planned cataract or glaucoma surgery. Furthermore, co-administration with certain strong CYP3A4 inhibitors may limit eligibility.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Floprost-MR (Tamsulosin Hydrochloride) has officially documented interaction patterns primarily involving metabolic enzyme inhibition and additive blood pressure effects.

Formally Prohibited Combinations

Co-administration with the following substances is strictly prohibited based on regulatory documents:

  • Strong inhibitors of CYP3 A4 (e.g., ketoconazole): Prohibited due to a significant increase in the plasma concentration and exposure (AUC) of Tamsulosin, which is a pharmacokinetic interaction.
  • Other alpha-adrenergic blocking agents (e.g., doxazosin, alfuzosin): Prohibited due to the potential for symptomatic hypotension resulting from an additive pharmacodynamic effect.

Pharmacokinetic and Pharmacodynamic Cautions

Regulatory authorities advise caution when co-administering Floprost-MR with several other drug classes:

  • Moderate CYP3 A4 inhibitors (e.g., erythromycin) and CYP2 D6 inhibitors (e.g., paroxetine): Caution is required due to the potential for increased Tamsulosin exposure. Caution is specifically advised for CYP2 D6 poor metabolizers when strong CYP3 A4 inhibitors are present.
  • Phosphodiesterase-5 ( PDE5) inhibitors (e.g., sildenafil): Caution is advised as concurrent use may result in symptomatic hypotension due to additive vasodilatory effects.
  • Cimetidine: Co-administration may increase Tamsulosin plasma concentrations by reducing its clearance, necessitating caution. Separately, the regulatory label notes that co-administration with Furosemide causes a decrease in plasma concentration, but this change is officially considered clinically insignificant.

Mechanism of Action

How Floprost-MR Works

Floprost-MR (Tamsulosin Hydrochloride) functions by directly modulating key physiological systems that control smooth muscle tone in the lower urinary tract. The drug’s action is defined by a high degree of mechanistic uroselectivity.


Targeted alpha1A Receptor Blockade

The primary mechanism involves selective competitive antagonism of the alpha1A-adrenoceptors found predominantly on the smooth muscle cells of the prostate capsule and bladder neck . By binding to these receptors, the drug prevents the natural activation by Norepinephrine (NE), thereby interrupting the sympathetic signal that causes muscle contraction. This action initiates a cascade that suppresses the intracellular signaling required for the muscle to tighten.


Reduction of Dynamic Outflow Resistance

The sustained interruption of the sympathetic signal leads to the relaxation of smooth muscle tone in the lower urinary tract. This physiological change reduces the dynamic component of urethral resistance, which is the mechanical pressure exerted on the urinary passage. The modified-release mechanism provides a sustained blockade, resulting in a continuous reduction in resistance, and contributes to a modification of the mechanical flow dynamics. This mechanism, however, does not influence the static component (fixed prostate size).

Dosage and Administration Information

How to Use Floprost-MR

Floprost-MR is administered through the oral route as a Modified-Release (MR) capsule designed to deliver the active ingredient, Tamsulosin Hydrochloride, consistently over a 24-hour period.

Standard Dosing Protocol

The standard adult regimen, which is intended for long-term use, begins with a starting dose of 0.4 mg taken once daily. This 0.4 mg also serves as the typical maintenance dose for ongoing treatment. The dose can be increased to a maximum of 0.8 mg once daily if the initial 0.4 mg dose does not achieve the intended effect following a period of assessment.

Administration and Procedural Conditions

For proper use, the capsule must be taken approximately one-half hour following the same meal each day (e.g., after breakfast) to ensure reliable and consistent absorption. It is critical that the capsule be swallowed whole and must not be crushed, chewed, or opened, as this practice would interfere with the controlled-release mechanism.

Procedural Constraints: The medicine is intended for continuous, long-term administration. If therapy is interrupted for several days, the patient must restart the treatment at the initial 0.4 mg once-daily dose. The medication is not indicated for use in the pediatric population (under 18 years of age), and dose adjustments are generally not required for mild to moderate kidney or liver function impairment.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Floprost-MR

Evidence for Use in Benign Prostatic Hyperplasia (BPH) and LUTS

Research exploring the use of Floprost-MR was studied for the signs and symptoms associated with Benign Prostatic Hyperplasia (BPH), which is a condition marked by functional limitations in the lower urinary tract. The evidence base is drawn from a combination of short-term, randomized controlled trials (RCTs), systematic reviews, and observational studies. These studies monitored changes in patient-reported outcomes describing perceived discomfort, alongside objective outcomes linked to physiological strain or stress and bladder function. The research was conducted during periods of increased symptom activity in adult men with moderate to severe symptoms.

The RCTs examined how symptoms evolved in the observed populations by tracking changes in standardized measures, such as the International Prostate Symptom Score (IPSS). These symptom scores are used in research exploring how symptoms change over time and reflect daily functioning. Systematic reviews and meta-analyses have synthesized data from these short-term studies, exploring patterns in symptom score measurements and functional tests like the Maximum Urinary Flow Rate (Q max) across the treatment and placebo groups.

Short-Term Placebo-Controlled Trial Design

Initial clinical research was evaluated in a double-blind, placebo-controlled setting. This trial design means that neither the patient nor the researcher knew whether Floprost-MR or an inactive capsule (placebo) was observed in the study, which helps ensure that any findings describe patterns observed in the studies without bias. The typical primary period for these definitive short-term trials was observed in studies lasting around 12 to 13 weeks. The double-blind trials also studies monitored the reporting of safety events, which was observed in both the active treatment and placebo groups.


Long-Term Studies and Follow-Up

To explore what happens over extended periods, open-label extension studies were conducted. These open-label studies offer data exploring longer-term patterns, but they are not the same as the initial blinded RCTs because they lack a simultaneous placebo group. Observational and post-marketing studies have also studies explored the long-term experience of patients using Floprost-MR in real-world clinical practice, where the evidence is derived from settings with varying symptom burdens. These long-term reports help contextualize how patients reported their experience over years, but they are subject to limitations such as patient withdrawal.


What is Still Uncertain About Floprost-MR Research

Although many trials research examined short-term symptom patterns, long-term effects are not fully established under the most rigorous study conditions. This means that comparative evidence is lacking for the durability of the initial reported patterns against a placebo beyond a few months. Research has explored whether the use of Floprost-MR relates to the need for surgical intervention or the risk of acute urinary retention, but evidence is limited for these long-term progression outcomes.

Frequently Asked Questions (FAQ)

Common questions about Floprost-MR (FAQ)

Q: Is Floprost-MR a type of antibiotic, or is it something else?

Floprost-MR is not an antibiotic. It is classified as an alpha-adrenergic receptor antagonist, commonly referred to as an alpha-blocker. This type of medicine works by selectively targeting receptors found on the smooth muscle tissue of the lower urinary tract.

Q: Why is Floprost-MR often used for conditions related to the prostate?

The medicine is primarily used for conditions related to the prostate because it is a selective alpha-blocker. This means its main function is to target and block specific alpha1A adrenoceptors found mostly on the smooth muscle cells of the prostate capsule and bladder neck. This targeted action causes muscle relaxation in that specific area.

Q: Is Floprost-MR the same as other 'Floprost' drugs, or is it different because of the 'MR'?

Floprost-MR is a brand name containing the active ingredient Tamsulosin Hydrochloride. The abbreviation 'MR' stands for Modified-Release, which is a special capsule design. This formulation allows the medicine to be delivered gradually and consistently over a full 24-hour period, which may differ from other potential forms of the medicine.

Q: What makes the 'MR' formulation different from an immediate-release version?

The Modified-Release ('MR') formulation is a specialized dosage form designed to control the release of the active ingredient. Unlike an immediate-release version which delivers the full dose immediately, the MR formulation releases the medicine gradually over 24 hours to help maintain stable therapeutic levels.

Q: How does the MR version of Floprost-MR help with dosing?

The Modified-Release formulation is specifically designed for once-daily administration. This controlled-release mechanism helps maintain stable, consistent therapeutic drug levels continuously over a full 24-hour period.

Q: How quickly should I expect to see any changes after starting Floprost-MR?

Official regulatory information suggests that the full effect of the medicine may be assessed after approximately two to four weeks of consistent use. This timeframe allows the prescribing doctor to evaluate the initial dose and determine if a change is needed based on how the patient has responded.

Q: If I miss a dose of Floprost-MR, what generally happens?

Regulatory patient information advises taking it as soon as it is remembered if a dose has been missed. However, if a full day has passed, regulatory guidance indicates that you should skip the missed dose and return to your regular schedule. It is advised not to take two doses at the same time to compensate for a missed dose.

Q: What happens if I stop taking Floprost-MR suddenly?

Official information describes that if administration is discontinued or interrupted for several days, restarting treatment at the initial dose is advised. The regulatory label does not explicitly state the expected medical or physiological outcome if a patient suddenly stops taking the drug without medical supervision.

Q: Are there any common foods or drinks that interact with Floprost-MR?

Official regulatory information requires that the capsule be taken approximately half an hour following the same meal each day to ensure consistent absorption. Beyond this meal requirement, the official label does not list prohibitions for specific common foods or non-alcoholic drinks.

Q: Can Floprost-MR be taken with over-the-counter pain relievers like ibuprofen?

Regulatory labeling provides warnings and cautions regarding co-administration with specific classes of prescription drugs, such as strong CYP3A4 inhibitors and other alpha-blockers. The regulatory label lists cautions for specific medications; however, it does not specifically list non-steroidal anti-inflammatory drugs (NSAIDs) like ibuprofen as a mandatory caution.

Q: Does Floprost-MR affect blood pressure?

While Floprost-MR is not prescribed to treat high blood pressure, it is an alpha-blocking agent, and regulatory warnings mention it can be associated with low blood pressure effects. Symptoms of orthostasis (a drop in blood pressure when standing up), such as dizziness or lightheadedness, are reported more frequently in treated patients compared to placebo.

Q: Is it normal to feel a bit dizzy when taking Floprost-MR?

Dizziness is listed in official documentation as a commonly reported adverse event. Clinical trial data showed that dizziness was reported by 14.9% to 17.1% of patients taking the drug, which was a higher rate than those taking the placebo.

Q: Can Floprost-MR cause fatigue or feeling tired?

Clinical trial data indicates that asthenia, which is often described as a loss of energy or muscle strength, was commonly reported by patients taking the medication. This adverse event was observed at a higher rate in patients taking the medicine compared to those taking a placebo in the studies.

Q: Can Floprost-MR cause any issues with sleep?

Clinical trial data shows that both somnolence (drowsiness) and insomnia (difficulty sleeping) were reported as adverse events in a small percentage of patients. For example, somnolence was reported in 3% to 4.3% of patients during the clinical studies.

Q: Is it true that Floprost-MR can sometimes cause problems with vision?

Vision-related adverse events, including blurred vision and decreased visual acuity, have been reported in post-marketing surveillance. Furthermore, the official label carries a specific warning about the risk of Intraoperative Floppy Iris Syndrome (IFIS), a complication that may occur during cataract or glaucoma surgery.

Q: Can Floprost-MR affect fertility?

Abnormal ejaculation events, which include ejaculation failure and a decrease in semen, have been reported in patients using this medicine. Furthermore, animal studies in male rats revealed reduced fertility due to impaired ejaculation, though this effect was reported as reversible.

Q: Do older people react differently to Floprost-MR compared to younger adults?

According to the official regulatory documentation, clinical studies did not observe an overall difference in effectiveness or safety between patients 65 years and older compared to younger adults. However, a greater sensitivity in some older individuals cannot be entirely excluded.

Q: Is Floprost-MR considered a high-risk medication?

Regulatory documents outline a number of required warnings and precautions for this medicine. These include the potential for orthostatic hypotension (low blood pressure when standing), Intraoperative Floppy Iris Syndrome during surgery, and the rare, serious risk of priapism (a prolonged erection).

Q: Is Floprost-MR a controlled substance?

No, Floprost-MR (Tamsulosin Hydrochloride) is not listed as a controlled substance by the Drug Enforcement Administration (DEA). This classification status relates to the drug's potential for dependence or abuse.

Q: Is there a generic version of Floprost-MR available?

Yes, Floprost-MR is a brand name for the active ingredient Tamsulosin Hydrochloride. This active ingredient is also available under generic labels, which may be prescribed depending on the local dispensing regulations.

Q: What kind of studies have been done on Floprost-MR?

The evidence base for Floprost-MR includes several types of studies defined by regulatory bodies. This includes short-term, randomized, double-blind, placebo-controlled clinical trials, as well as open-label extension studies and post-marketing observational studies.

Q: Is the efficacy of Floprost-MR supported by large clinical trials?

Studies assessing the medicine's use for BPH signs and symptoms have been conducted in large, double-blind, placebo-controlled clinical trials. This study type is used to evaluate the observed benefits of a medicine and formed the primary evidence base for its regulatory approval.

How should Floprost-MR be stored and disposed of?

Storage and Disposal Information

Floprost-MR (Tamsulosin Hydrochloride) must be stored under specific conditions to maintain product integrity, as defined by regulatory labeling.

Storage Requirement Official Condition
Temperature Store at controlled room temperature, generally 20 C to 25 C (68 F to 77 F).
Protection Keep away from excess heat and moisture; Do not freeze.
Container Keep the medicine in its original container and ensure the container is tightly closed.

Child-Safety Mandate: The medication must be kept out of the reach of children and stored in a location that is out of their sight and reach.

Disposal Instructions: Disposal of unused or expired Floprost-MR should follow official public health guidance. Individuals should consult a pharmacist or utilize a designated drug take-back program where available. The capsules are not recommended for flushing. If a take-back program is unavailable, follow the procedure of mixing the product with an undesirable substance (e.g., dirt) and sealing it before discarding in the household trash.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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