Mastoprofen, a topical medication, is commonly used for providing localized symptomatic relief in contexts involving cyclical hormonal changes. The therapeutic approach aims to address symptoms that interfere with daily functioning. This approach is aligned with the goal of managing symptoms related to physical discomfort.

The medication offers supportive therapeutic benefit by addressing symptom clusters that typically occur and intensify during certain phases of the menstrual cycle, primarily impacting the breast tissue. It is relevant in clinical settings marked by heightened patient distress and is applied to help manage cyclical breast pain (mastalgia), tenderness, and premenstrual breast congestion. It is considered relevant in conditions involving episodic or fluctuating manifestations, and the supportive action contributes to improved comfort during symptomatic periods, supports general well-being during symptomatic phases.

“The localized approach supports patients by offering symptomatic relief where symptomatic support for localized discomfort is needed.”

The official regulatory documents strictly define the population eligible to use Mastoprofen, which is established primarily for Adult Women of reproductive age. The status of this hormonal medicine specifies several absolute contraindications, meaning specific groups must not use the topical gel under any circumstances.

Absolute Contraindications (Must Not Use)

Use of Mastoprofen is contraindicated in patients with a known or suspected hormone-sensitive malignancy (such as breast or endometrial cancer). It is also prohibited for individuals with a history of or current venous thromboembolism (blood clots), severe hepatic (liver) impairment, undiagnosed abnormal genital bleeding, or a known hypersensitivity to the active substance (progesterone) or any excipient.

Age and Physiological Restrictions

The medicine is not approved and safety and efficacy have not been established in the pediatric population. For older adults, use is advised with caution due to limited data.

Use is generally contraindicated during pregnancy for the product’s approved indication and is not recommended during lactation.

Conditional Use

Conditional use, specified as use with caution, is required for patients with comorbidities susceptible to fluid retention, including asthma, epilepsy, migraine, or cardiac and renal dysfunction, as well as those with mild to moderate hepatic impairment.

Interactions with other medicines and products

Official regulatory documents detail multiple, clinically significant drug-drug interactions for Mastoprofen, primarily related to increased risk of bleeding and altered drug clearance. The concomitant use of Anticoagulants (such as warfarin) or Anti-platelet agents (including low-dose acetylsalicylic acid) is officially recognized as increasing the risk of serious hemorrhage, requiring close monitoring of coagulation and cautious use. The combination of Mastoprofen with other Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), including cyclooxygenase-2 (COX-2) selective inhibitors, is explicitly restricted to avoid additive gastrointestinal and systemic risks.

The regulatory profile documents a risk of attenuated therapeutic effects when Mastoprofen is co-administered with certain Antihypertensives (like ACE Inhibitors or Angiotensin II Antagonists) and Diuretics, and this combination may also precipitate a deterioration of renal function, particularly in elderly or volume-depleted patients. Furthermore, the clearance of drugs like Lithium and Methotrexate is documented to be reduced by Mastoprofen, potentially leading to increased plasma concentrations and toxicity. Concomitant use with Selective Serotonin Reuptake Inhibitors (SSRIs) and Corticosteroids carries an officially documented increased risk of bleeding.

Mastoprofen is a topical pharmaceutical formulation containing Progesterone. Progesterone acts as an agonist by binding to the Progesterone Receptor (PR), a nuclear receptor. Upon ligand binding, the activated PR translocates into the nucleus, where it functions as a transcription factor, modulating the expression of target genes. This gene modulation affects cellular proliferation, differentiation, and secretory processes in the target tissue. When applied topically, the compound is proposed to exert its primary action via local tissue accumulation. The downstream molecular and cellular consequences involve local restoration of the estradiol-to-progesterone hormonal balance at the cellular level. This modulation affects specific cellular responses and microvascular permeability within the targeted biological system, leading to altered localized tissue characteristics.

How to Use Mastoprofen

Mastoprofen is a prescription-only medication that is used according to a specific, high-level administration protocol. The medicine is strictly a topical agent intended for external application to the skin, which establishes its route of administration.

Its usage is structured around a cyclic daily schedule designed to align with the menstrual cycle, rather than being used continuously. The gel is applied once daily for a total of 10 days per cycle, typically starting on the 16^th day and concluding on the 25^th day. This regimen is usually maintained for a course of three to six consecutive cycles before the need for continued use is assessed.

Official Dosing and Administration Instructions

For administration, the measured amount of gel is spread over the application site. If a dose is missed, patients should proceed with the next scheduled application during the defined 10-day period. This medication is not intended for use in prepubescent children.

Research Evidence / Overview of Studies for Mastoprofen

Evidence for Use in Cyclical Breast Pain (Cyclical Mastalgia)

Research has primarily involved Randomized Controlled Trials (RCTs). These studies often compare the active gel against a placebo (a dummy gel). These trials were primarily applied in research contexts examining conditions presenting with cycles of stability and flare-ups, enrolling reproductive-age women experiencing moderate to severe cyclical discomfort.

Research monitored patient-reported outcomes, specifically focusing on how subjective pain severity changed over time, usually over a few menstrual cycles. Some trials reported measurements of pain scores, with findings provided data for comparison with the patterns observed in the placebo group. Scientific reviews acknowledge that the findings describe patterns observed in the studies over the short- to intermediate-term.

Evidence for Use in Cyclical Breast Tenderness and Tension

The topical gel was studied for conditions characterized by fluctuating or episodic manifestations, such as cyclical breast tenderness and tension (mastodynia). Research has explored the use of the gel in women with these specific outcomes related to physical discomfort. In these studies, researchers monitored subjective reports of feelings like tension and heaviness in the breast tissue.

Reviews noted that the evidence base for this specific symptom cluster is often grouped with pain (mastalgia), meaning separate findings for tension alone are limited. Data are still emerging regarding the clinical significance of measurement variability across different trials.

Long-Term Outcomes, Gaps, and Specific Groups

Most available evidence is derived from studies with limited follow-up durations, typically observing patient outcomes over two to six menstrual cycles. This short-term research contributes to understanding symptom patterns during the observation period. However, long-term effects are not fully established regarding how symptoms evolve after the treatment is stopped, representing a recognized gap in the evidence landscape.

Research has included subgroup analyses for women diagnosed with fibrocystic breast disease (FBD) who experience associated cyclical pain. Conversely, data for certain groups remain insufficient, and results apply only to the populations studied. Scientific consensus holds that comparative evidence is lacking for some alternative approaches, and findings were mixed when different systematic reviews examined patient-reported experiences.

Key Studies & References

1. Diagnosis and management of benign breast disease
2. Management of mastalgia in primary care: a review of current evidence and practice

Common questions about Mastoprofen (FAQ)

Q: Does Mastoprofen cause stomach issues like other NSAIDs might?

According to official product information, nausea is listed as a common side effect of Mastoprofen, meaning it may affect between 1 and 10 out of every 100 users. While this is a gastrointestinal issue, other specific stomach problems are not commonly categorized in the same way as some other classes of medicines.

Q: Can older people take Mastoprofen safely?

Official documents state that the use of Mastoprofen is advised with caution in older adults due to limited available research data. This caution is also noted because of a documented risk of possible deterioration of kidney function when this medicine is used alongside certain other medications, especially in patients already susceptible to renal issues.

Q: Does Mastoprofen interact with anxiety or depression medications?

Official regulatory documents specifically highlight a known increased risk of bleeding when Mastoprofen is taken with Selective Serotonin Reuptake Inhibitors (SSRIs). The risk is documented for this specific class of medicine, which is commonly used to treat anxiety and depression.

Q: What is the difference between prescription Mastoprofen and over-the-counter pain relievers?

Mastoprofen is a prescription-only medicine that belongs to the pharmacological class of progestins, which are steroid hormones. This is a fundamentally different type of medicine than many over-the-counter pain relievers, which often belong to the Non-Steroidal Anti-Inflammatory Drug (NSAID) class.

Q: Are there specific symptoms that mean I should stop taking Mastoprofen immediately?

Official labeling for the progestogen class highlights the potential for serious outcomes, such as thromboembolic events (blood clots). Official safety information emphasizes the importance of recognizing the signs of serious conditions, which may indicate a need for immediate medical attention.

Q: What is the general success rate reported in studies for Mastoprofen?

Research into Mastoprofen has primarily consisted of studies comparing the active gel against a placebo (a dummy gel). These studies report patterns in patient-reported outcomes, such as how subjective feelings of discomfort and pain severity changed over the observation period when compared to the placebo group.

Q: Are there restrictions on driving or operating machinery while taking Mastoprofen?

The official list of adverse reactions includes dizziness and fatigue as uncommon effects. Official regulatory advice typically addresses the need for individuals to be cautious regarding driving or operating heavy machinery if they experience adverse reactions such as dizziness or fatigue.

Q: What makes Mastoprofen different from a steroid?

The active ingredient in Mastoprofen, progesterone, is officially classified as a naturally occurring steroid hormone. However, it belongs specifically to the class of progestins (sex hormones), which function differently in the body than other classes of steroids, such as corticosteroids.

Q: Are there any specific organs Mastoprofen is known to protect or damage?

Official regulatory documents identify risks related to several organ systems, which is the basis for contraindications in certain pre-existing conditions. These areas include the liver, the vascular system (due to the potential for blood clots), and the kidneys (due to a risk of functional deterioration when certain other medicines are used).

Q: Why are there warnings about taking Mastoprofen before surgery?

Warnings regarding surgical procedures exist because the progestogen class of medicine has a documented potential to increase the risk of thromboembolic events (blood clots) and may increase the risk of bleeding. This is a critical factor in any surgical setting, and official guidance on the timing of discontinuation is provided in the full prescribing information.

Q: Is Mastoprofen the same type of drug as ibuprofen or naproxen?

No, Mastoprofen (progesterone topical gel) is not the same type of medicine as ibuprofen or naproxen. Mastoprofen is classified as a progestin, which is a type of steroid hormone. In contrast, ibuprofen and naproxen belong to the Non-Steroidal Anti-Inflammatory Drug (NSAID) class.

Q: Can Mastoprofen be used for pain relief that isn't related to its main purpose?

Regulatory documents define the medicine’s officially approved use strictly for the localized treatment of symptoms related to cyclical breast discomfort (mastalgia and mastodynia). It is not officially approved for other types of pain relief.

Q: How long does the effect of one dose of Mastoprofen last?

Official data on how the body handles the drug (pharmacokinetics) suggests a prolonged absorption that aligns with the required once-daily application. However, a specific time frame for how long the symptom-relieving effects of a single application last is not detailed in the official product information.

Q: Can Mastoprofen affect my blood pressure?

Pharmacological reviews indicate that the active ingredient, progesterone, can have anti-mineralocorticoid effects that influence the body’s fluid and sodium balance. This influence may indirectly affect blood pressure. The official documentation includes warnings for use in individuals with pre-existing cardiac (heart) or renal (kidney) dysfunction.

Q: Are there any common foods or drinks that interact with Mastoprofen?

According to official regulatory documents for the topical gel formulation of Mastoprofen, there are no common food or drink interactions listed that require special precaution.

Q: Is it safe to drink alcohol while taking Mastoprofen?

The official product information for the Mastoprofen topical gel formulation does not list a specific drug-alcohol interaction or an official warning against the use of alcohol.

Q: Is Mastoprofen addictive?

Mastoprofen is not classified as a controlled substance by regulatory bodies. Furthermore, official product information and documentation do not list addiction or dependence as a risk associated with its use.

Q: Does Mastoprofen have different names in other countries?

Mastoprofen is a brand name. The active substance it contains is progesterone, which is the internationally recognized name for the hormone. This active ingredient is available in various topical gel formulations marketed under different brand names in different countries.

Q: Can Mastoprofen cause insomnia?

While insomnia is not explicitly listed as a side effect, official documents list mood changes and fatigue as uncommon adverse reactions. Progesterone, the active ingredient, generally tends to be associated with sedative effects rather than stimulating effects.

Q: Is Mastoprofen known to cause weight gain?

Official regulatory documents acknowledge that weight gain is a potential minor hazard associated with the broader progestogen class of medicines. This is often attributed to the possibility of fluid retention caused by the hormonal effects of progesterone.

Q: Do I need a special diet when taking Mastoprofen?

Since Mastoprofen is applied externally as a topical gel and is not ingested, the official regulatory documents do not specify any special or restrictive diet that must be followed while using the medicine.

Q: Is it true that Mastoprofen can sometimes be used to help with fevers?

The officially approved use of Mastoprofen is strictly for the localized treatment of symptoms related to cyclical breast discomfort (mastalgia or mastodynia). Official regulatory documents do not list or approve this medicine for use in the treatment of fever.

Q: Is a generic version of Mastoprofen available?

Mastoprofen is a brand-name, prescription-only medicine. The active ingredient, progesterone topical gel, is often available in generic or other branded formulations. However, the exact availability and regulatory status of a generic equivalent may vary by location.

How to Store and Dispose of Mastoprofen?

Storage and disposal instructions for Mastoprofen (progesterone topical gel) are based strictly on official government regulatory documents.

Storage Requirements

Mastoprofen must be stored at or below 25 C (77 F). The product must be kept in its original, tightly closed container and protected from moisture and direct heat. It is strictly mandated that the gel should not be frozen.

All medicine must be stored out of the sight and reach of children to prevent accidental exposure.

Disposal Instructions

Unused or expired Mastoprofen should be returned to a pharmacy take-back program or another authorized collection point for proper pharmaceutical waste handling. If a take-back program is unavailable, it can be discarded in the household trash after being mixed with an undesirable substance, such as coffee grounds, and sealed in a container. The product must not be flushed down the toilet.