Sotrat

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Sotrat

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Sotrat

What is Sotrat?

Sotrat is a pharmaceutical medication developed for the treatment of pulmonary arterial hypertension (PAH). It belongs to a class of drugs known as activin signaling inhibitors. Unlike traditional therapies that primarily focus on dilating the blood vessels, Sotrat is designed to address the underlying cellular changes associated with the disease.

Mechanism of Action

In individuals with pulmonary arterial hypertension, there is an imbalance in cellular signaling that leads to the thickening and narrowing of the pulmonary arteries. This remodeling increases the workload on the right side of the heart.

Sotrat works by targeting specific proteins in the transforming growth factor-beta (TGF-β) superfamily. By rebalancing these signaling pathways, the medication aims to reduce the abnormal proliferation of cells within the vessel walls. This process is intended to improve blood flow through the lungs and decrease the overall pulmonary arterial pressure.

Therapeutic Intent

The primary goal of treatment with Sotrat is to improve exercise capacity and manage the symptoms associated with PAH, such as shortness of breath and fatigue. By addressing the structural remodeling of the pulmonary vasculature, the medication seeks to enhance the functional status of patients living with this chronic condition.

Regulatory References

  1. Isotretinoin Monograph (NIH/NCBI)

What side effects are possible with Sotrat?

Possible side effects and safety information

The safety profile of Sotrat (Isotretinoin) is defined by its extensive effects across multiple System-Organ Classes, as documented in official regulatory labeling. Adverse reactions are classified by frequency, ranging from highly common to rare and serious events.


Frequency-Classified and Systemic Effects

  • Very Common adverse reactions affect more than 1 in 10 patients and primarily involve mucocutaneous and musculoskeletal systems. These include severe Cheilitis (dry lips), Xerosis (dry skin), Dry eyes, Epistaxis (nosebleeds), Arthralgia (joint pain), and Back pain. Laboratory findings of Increased blood Creatine Kinase are also classified as Very Common.
  • Common effects include Headache and certain Dermatitis/Rashes.
  • Rare but serious events include the onset of Depression, Psychosis, and reports of Suicidal Ideation.

Documented Serious and Population-Specific Safety Constraints

Regulatory documents highlight severe systemic risks. These Serious Adverse Reactions include the potential for Pseudotumor Cerebri (increased pressure around the brain), acute Pancreatitis, Inflammatory Bowel Disease (IBD), and severe Skin Reactions like Stevens-Johnson Syndrome (SJS).

The most critical constraint is the absolute risk of Teratogenicity; Sotrat is a potent human teratogen, and its use is absolutely contraindicated in Female Patients of Childbearing Potential due to the risk of severe birth defects. Safety notes also address risks in adolescents, such as Premature Epiphyseal Closure and skeletal changes, typically associated with long-term exposure.

Official restrictions require caution or avoidance of co-administration with certain agents, such as Tetracyclines (due to increased risk of Pseudotumor Cerebri) and Vitamin A supplements (due to risk of additive toxicity).

Overdose and Emergency Response

Overdose and When to Seek Help

The official overdose profile for Sotrat (Isotretinoin) is defined by its potential for acute toxicity, which often resembles an exaggerated state of Hypervitaminosis A.

Documented Overdose Manifestations

Symptoms reported in regulatory labeling following acute overingestion are generally described as mild and may resolve spontaneously. These documented manifestations include:

  • Headache
  • Vomiting
  • Dizziness and loss of coordination (ataxia)
  • Stomach pain (abdominal pain)
  • Flushing (warmth or tingling in the face)
  • Severe chapped lips (cheilitis)

Required Emergency Actions

The regulatory mandate requires specific immediate actions for any suspected or confirmed overdose. Patients must seek immediate medical attention or contact a poison control center or emergency room at once.

Management is primarily symptomatic and supportive. No specific antidote for Isotretinoin overdose is known or documented in the official prescribing information. In cases of recent acute ingestion, procedural measures such as gastric lavage or the administration of activated charcoal may be considered as part of the supportive treatment strategy.

Therapeutic Uses of Sotrat

Sotrat (Isotretinoin) is a specialized, systemic retinoid reserved for specialized management in cases where patients experience symptoms related to severe acne. It may support the achievement of sustained improvement in the condition where conventional therapies have failed.


Severe Acne, Resistance, and Scarring Risk

Sotrat is commonly used to help with the most intense forms of the disease, including severe nodular, cystic acne, and acne conglobata. The treatment is considered relevant when supportive symptom management is appropriate due to the condition proving resistant to adequate courses of standard therapy. It is relevant for managing symptoms related to the deep, painful lesions that characterize these conditions.

Quick Fact: Relevant for Symptoms Related to Destructive Skin Lesions

The systemic intervention contributes to easing the overall symptom load: it may assist with easing the symptoms related to physical discomfort caused by large nodules and cysts, and it may assist in reducing the likelihood of new, permanent scarring and disfigurement. The medication is applied in addressing these symptoms when they create noticeable functional strain.

Regulatory References

  1. UK Government guidance on isotretinoin

Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Sotrat — Official Regulatory Information


The eligibility profile for Sotrat (isotretinoin) is defined by stringent restrictions, primarily due to the high risk of severe birth defects (teratogenicity).

Populations for whom use is Contraindicated (Must Not Use):

  • Pregnancy: The medicine is strictly contraindicated in female patients who are pregnant or who may become pregnant.
  • Hypersensitivity: Patients with known allergy to isotretinoin or any component (such as parabens) are excluded.
  • Concomitant Drugs: Use with tetracycline antibiotics is contraindicated due to the risk of pseudotumor cerebri (benign intracranial hypertension).

Age-Related Eligibility:

  • Sotrat is generally indicated for patients 12 years of age and older.
  • Safety and efficacy have not been established in children under 12 years of age.

Conditional Use and Restrictions:

  • Patients of Childbearing Potential: Female patients must comply fully with a mandatory restricted distribution program (e.g., iPLEDGE in the U.S.). Eligibility is conditional upon strict adherence to required, scheduled pregnancy testing and the continuous use of two forms of effective contraception before, during, and for one month after treatment.
  • Blood Donation: Patients are prohibited from donating blood during treatment and for one month after the last dose to prevent fetal exposure via transfusion.
  • Breastfeeding: Use is generally not recommended due to the possibility of the medicine transferring into breast milk.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory profile for Sotrat (Isotretinoin) defines specific interaction patterns with other medicines, supplements, and products, primarily involving additive toxic effects and pharmacokinetic constraints.

Contraindicated Combinations

The co-administration of Sotrat with certain substance classes is strictly restricted by regulatory authorities:

  • Tetracycline Antibiotics: Concurrent use is formally contraindicated due to the documented risk of developing benign intracranial hypertension (pseudotumor cerebri).
  • Vitamin A Supplements and Oral Retinoids: Use with Vitamin A supplements or other systemic retinoids is prohibited because of the potential for additive toxicity, which increases the risk of hypervitaminosis A.

Additive Risks and Efficacy

Certain combinations are advised against due to pharmacodynamic interactions or efficacy concerns:

  • Progesterone-only Contraceptives: Sotrat may reduce the efficacy of these contraceptives, rendering them an inadequate sole method of contraception during therapy.
  • Methotrexate: Co-administration is cautioned against because it may increase the risk of hepatotoxicity (liver damage).
  • Topical Agents: Harsh topical keratolytic or abrasive agents must be avoided due to the potential for significant additive local irritation.

Food and Substance Interactions

Sotrat's systemic exposure is highly dependent on administration conditions. Co-administration with a high-fat meal is a formal pharmacokinetic requirement, as this condition significantly increases the drug's absorption and total exposure ( AUC). Caution is also advised regarding alcohol consumption due to the potential for additive hepatotoxicity.

Mechanism of Action

Sotrat's (Isotretinoin) mechanism of action involves specific, genomically mediated pathways that alter the structural and functional biology of the skin's oil-producing units.

Nuclear Receptor Agonism and Sebocyte Apoptosis

The core mechanism involves the drug's active form acting as an agonist that binds to Retinoic Acid Receptors ( RARs), primarily the RAR-gamma subtype, which are nuclear transcription factors. This activation modulates gene expression, triggering a cascade that leads to the selective and sustained programmed cell death ( apoptosis) of sebocytes, the specialized cells responsible for producing skin oil (sebum).

Sustained Sebostasis and Follicular Normalization

The systematic elimination of sebocytes results in a profound and long-lasting suppression of sebum secretion ( sebostasis), and a substantial reduction in the size of the sebaceous glands. Complementing this, the drug modulates the maturation of skin cells ( keratinocytes) lining the hair follicle, which limits the occurrence of cellular obstruction and dampens local inflammatory responses within the tissue. These actions collectively alter the physiology of the pilosebaceous unit, eliminating the conditions required for heightened sebaceous-related activity.

Dosage and Administration Information

How to use Sotrat

Sotrat, which contains the active ingredient isotretinoin, is administered systemically and requires adherence to a strict, weight-based dosing protocol and a defined course duration.


Administration Scope

Feature Official Instruction Summary
Route of Administration The medication is for oral administration, provided in soft gelatin capsules.
Dosing Schedule Dosing is determined by body weight, typically beginning at 0.5 mg/kg/day. The usual maintenance range is 0.5 to 1.0 mg/kg/day, administered in two divided doses daily. The maximum daily dose may reach 2.0 mg/kg for severe cases.
Preparation Requirements Capsules must be swallowed whole with a full glass of liquid and must not be crushed or chewed to avoid irritation. Some formulations are specifically directed to be taken with a meal for proper absorption.
Age-Group Rules The medication is indicated for use in patients 12 years of age and older and is not generally recommended for children under 12 years of age.
Missed-Dose Rules If a dose is missed, the patient should skip that dose and resume the regular schedule; doses should not be doubled to make up for the missed amount.

Treatment Course and Schedule

Treatment is administered as a single, time-limited course, usually lasting from 15 to 20 weeks. Re-treatment, if necessary, may only be initiated after a minimum treatment-free interval of at least 8 weeks (or 2 months) following the completion of the first course. Long-term use of the medication is not recommended. The use of this medicine must comply with any required risk management programs in the prescribing jurisdiction.

Recent Clinical Evidence

Research evidence / Overview of studies for Sotrat

Evidence for Use in Severe, Recalcitrant Nodular Acne

The core research for Sotrat has focused on severe nodular and cystic acne. This evidence base primarily consists of Randomized Controlled Trials (RCTs), where patients were observed over a defined time interval, and large-scale Systematic Reviews that combine the findings of multiple smaller studies. These trials were primarily used in research exploring how symptoms change over time when patients are administered the medication, often comparing the outcomes to a placebo or to standard treatments like systemic antibiotics.

Researchers explored outcomes related to inflammatory or irritative states by monitoring two key measurements: the total number of severe lesions (nodules and cysts) and the physician's overall assessment of acne severity using standardized scoring systems. Studies described patterns where reductions in measured sebum production were observed and severity scores showed changes in the populations during the treatment period. The research so far explored symptom patterns in patients whose severe acne had been documented as unresponsive to previous conventional treatments.


Long-Term Follow-up and Durability of Outcomes

Beyond the initial treatment period, research has also explored the durability of observed findings. This research often takes the form of observational cohort studies, where the same groups of patients were monitored over extended periods—sometimes up to five years—after treatment cessation. These studies were applied in research contexts involving fluctuating or unstable symptoms to track if the severe acne returned (relapsed) and required further intervention.

Studies report how symptoms evolved in the observed populations over these extended durations. Research highlights changes measured during the study period, but the findings were mixed regarding the exact rates of relapse. Data show patterns related to acne recurrence, which varied significantly across different research groups, making it difficult to establish a single, reliable long-term prediction. Long-term patterns and outcomes are not fully established with the same certainty as the short-term changes because observational studies have inherent limitations, such as varying patient protocols and follow-up durations.


What is Still Uncertain and Research Gaps

Despite the foundational evidence, several areas of uncertainty remain. The evidence quality varies across studies, particularly for some of the earliest trials, which had modest sample sizes or limited follow-up durations. The variability in reported relapse rates is a significant research gap; factors that influence these rates are not consistently demonstrated across all studies. Research contributes to the broader evidence landscape, but it does not determine whether an individual will respond similarly or experience the same long-term pattern as the average patient in the studies.

Key Studies & References

  1. Acne recurrence after treatment with oral isotretinoin: 5-year follow-up (Observational Study)
  2. Is Oral Isotretinoin More Effective than Antibiotics in the Treatment of Severe Acne in Adults? (Systematic Review of RCTs)

Frequently Asked Questions (FAQ)

Common questions about Sotrat (FAQ)


Q: Is Sotrat the same type of medicine as [similar drug name]?

Sotrat contains the active ingredient isotretinoin, which is a synthetic derivative of Vitamin A. According to official product information, it belongs to a specific pharmacological class known as retinoids. This classification defines its fundamental structure and intended effects within the body.


Q: How long do the effects of Sotrat usually last?

Studies have explored the durability of the observed changes after the treatment course is finished. Long-term follow-up research monitors symptom patterns in patient populations over extended periods to track how effects evolve post-treatment.


Q: Can Sotrat be taken with common over-the-counter pain relievers?

Patient information materials suggest that common pain relievers, such as ibuprofen, may be used to address certain side effects, like muscle aches. Any decision regarding the use of non-prescription medication alongside Sotrat is typically addressed by the prescribing healthcare provider.


Q: Can Sotrat interact with herbal supplements like St. John's Wort?

Official documentation indicates that the prescribing physician should be aware of all nonprescription medications, vitamins, and herbal products being used. This guidance is provided due to the potential for the medicine to interact with other substances.


Q: Do side effects from Sotrat get better or go away over time?

Official patient information states that common side effects related to dryness generally resolve after the treatment course is fully completed. Additionally, discomfort such as muscle and joint aches may show a tendency to improve over time while a person is on treatment.


Q: What is known about taking Sotrat during pregnancy?

Regulatory documents describe Sotrat as a potent human teratogen. This means the medicine is known to cause a high frequency of severe and life-threatening birth defects. Consequently, its use is absolutely contraindicated for female patients who are pregnant or who may become pregnant.


Q: Can I take Sotrat if I have liver problems?

The regulatory label includes specific warnings regarding the potential for liver problems, including hepatotoxicity (liver damage). The regulatory label indicates that careful monitoring is associated with the management of patients who have pre-existing known liver disease, and in some cases, the medication may be contraindicated.


Q: How long after stopping Sotrat does it stay in the body?

Pharmacokinetic data indicates the medicine is rapidly eliminated from the body following the last dose. Sotrat has a relatively short half-life of 10–20 hours.


Q: Is Sotrat considered safe for long-term use?

Long-term continuous use of the medicine is not recommended by regulatory agencies. This is partly due to safety concerns, particularly in adolescents, which include potential skeletal changes associated with long-term exposure.


Q: What is the maximum amount of time Sotrat is studied for continuous use?

Official prescribing information states that treatment is administered as a single, time-limited course, typically lasting from 15 to 20 weeks. Re-initiation of treatment, if required, is typically preceded by a specified treatment-free interval.


Q: Are there any patient registries or support programs related to Sotrat?

To manage the risks associated with the medicine, regulatory requirements include a mandatory Risk Evaluation and Mitigation Strategy (REMS) program in many regions. These programs help manage risks and ensure patient education on safety constraints.


Q: Is alcohol consumption completely forbidden while using Sotrat?

Regulatory documents advise against excessive alcohol consumption. This caution is issued because alcohol may contribute to additive liver effects when combined with Sotrat.


Q: Do I need to change my diet while taking Sotrat?

The only mandatory dietary instruction in the official prescribing information is the requirement to take the capsule with a high-fat meal. This specific condition is necessary to ensure the proper absorption of the medication.


Q: Can I take Sotrat if I have kidney problems?

In patients with severe renal insufficiency, which refers to significant kidney problems, official guidelines indicate that treatment should be started at a lower dose. This approach is described in official guidelines for management of patients with renal insufficiency.


Q: Does Sotrat cause drowsiness or affect my energy levels?

Drowsiness or dizziness is listed as a very rare or uncommon adverse reaction in the official safety profile. Patients should be aware of this possibility, particularly when starting treatment.


Q: Is it normal to feel a bit nauseous when first starting Sotrat?

Nausea is a reported symptom cited in regulatory warnings. It is primarily mentioned in connection with monitoring for rare but serious adverse events, such as increased pressure around the brain (pseudotumor cerebri).


Q: Is it okay to drive or operate machinery while taking Sotrat?

Caution is advised because the ability to drive or operate machinery may be affected by visual disturbances. Official patient information specifically mentions the possibility of decreased night vision.


Q: Can Sotrat affect the results of lab tests (like blood tests)?

The regulatory label requires monitoring of certain blood tests during therapy. These monitored tests include liver function tests and lipid levels, which may be affected by the medication.


Q: Are there generic versions of Sotrat available?

The active ingredient in Sotrat, isotretinoin, has approved generic versions available in the United States and other markets. Generic availability is confirmed by regulatory bodies such as the FDA.


Q: How does being overweight or underweight affect the use of Sotrat?

Official administration instructions require a weight-based dosing protocol for the initial dose. Studies have examined patterns suggesting that a high Body Mass Index (BMI) may be related to certain outcomes.


Q: What are the signs that a rare but serious side effect might be happening with Sotrat?

Official warnings list signs associated with rare but serious events, such as increased pressure around the brain. These signs may include severe headache, blurred vision, or vomiting.


Q: Is it okay to stop taking Sotrat suddenly?

Official reports indicate that the medicine can be stopped abruptly without the need for a dose tapering period.


Q: What patient groups were included in the main clinical trials for Sotrat?

Study eligibility criteria typically excluded certain groups, such as pregnant patients and those under 12 years of age. Trial enrollment also generally excluded patients with pre-existing conditions like known kidney or liver disease.


Q: Can Sotrat cause changes in weight?

Official drug safety profiles do not list weight gain or weight loss as a direct adverse reaction to the medication.

How should Sotrat be stored and disposed of?

How to Store and Dispose of Sotrat

Sotrat (Isotretinoin) capsules must be stored according to specific regulatory requirements to maintain product stability.

Storage Conditions

Requirement Details
Temperature Store at Controlled Room Temperature, 20 C to 25 C (68 F to 77 F).
Protection The medicine must be kept in the original container and protected from light and moisture.
Child Safety Must be kept out of the reach of children.

Disposal Instructions

Unused or expired Sotrat should be disposed of using a drug take-back program as the preferred method. If a take-back option is unavailable, the medication may be discarded in the household trash by removing the capsules from the packaging, mixing them with an unappealing substance, and sealing the mixture in a bag. The capsules must not be crushed. Disposal must align with all local regulations.

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

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