Gemtra

Quick links to important sections

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 Gemtra

Quick Facts

Property Description
Active ingredient Gemcitabine
Form Lyophilized powder for solution for infusion
Pharmacological class Antineoplastic agent, Antimetabolite
General purpose Systemic cancer therapy (Chemotherapy)
Origin Synthetic compound

Defining Gemtra: Classification and Chemical Origin

Gemtra is the specific trade name for a prescription-only medication whose active ingredient is Gemcitabine. It is classified as an antineoplastic agent—a drug designed to inhibit the growth and spread of malignant cells—and is subcategorized as an antimetabolite. The substance is a synthetic compound that functions as a nucleoside analog, structurally mimicking the natural building blocks required for DNA synthesis. This class of drug is recognized for its ability to interfere with nucleic acid metabolism. The core purpose of the medicine is to disrupt the chemical processes cancer cells rely on for replication.

Composition and Pharmaceutical Presentation

The composition of Gemtra is that of a single-ingredient product containing Gemcitabine (typically as the hydrochloride salt). The medication is supplied as a lyophilized powder for solution for infusion to ensure stability and precise dosing.

This specialized form necessitates reconstitution, where the dry, sterile powder is precisely mixed with an appropriate aqueous solvent in a clinical setting before administration. The resulting solution is delivered directly into a vein via controlled intravenous infusion. The requirement for intravenous delivery is standard for this class of cytotoxic drug to ensure controlled systemic absorption and reliable therapeutic concentration. This route is essential for achieving the systemic action needed for oncology patients.

General Therapeutic Role in Systemic Care

The overall purpose of Gemtra is to achieve a broad, systemic suppression of uncontrolled cellular multiplication, which is the foundational goal of chemotherapy. The mechanism enables the medication to disrupt the replication cycles of fast-proliferating cells. As an antimetabolite, its function is linked to the induction of programmed cell death in abnormal cells, providing a targeted biochemical intervention. This action against cellular growth makes it a component of management strategies in cases requiring systemic cancer therapy.

Regulatory References

  1. Gemzar (gemcitabine) EPAR summary
  2. Gemcitabine (intravenous route) Label
  3. Gemcitabine Hydrochloride - NCI Drug Dictionary

What side effects are possible with Gemtra?

Possible Side Effects and Safety Information

The safety profile of Gemtra (Gemcitabine) is formally structured in regulatory documents to reflect the frequency and severity of reported adverse reactions. As an antineoplastic agent, its activity against fast-dividing cells leads to certain expected safety patterns, which are categorized by both frequency and the physiological system affected.


Key Regulatory Classifications

Category Description from Official Labels
Most Frequent Events (Very Common) Adverse reactions documented as very common (10%) include myelosuppression (anemia, neutropenia, thrombocytopenia), gastrointestinal issues (nausea, vomiting), fever, rash, and elevated hepatic enzymes (ALT/AST).
System-Organ Classes Effects are formally classified within the Blood and Lymphatic System, Gastrointestinal Disorders, Hepatobiliary Disorders, and Respiratory Disorders.
Serious Adverse Reactions (SARs) The regulatory label highlights rare but severe events such as Pulmonary Toxicity (including Acute Respiratory Distress Syndrome, ARDS), Hemolytic Uremic Syndrome (HUS), and severe cutaneous reactions (e.g., SJS/TEN).

Population and Exposure Safety Notes

The official safety information includes specific notes regarding exposure and specific patient groups. Schedule-dependent toxicity is documented, indicating that extended infusion times or more frequent administration schedules may increase the risk of toxicity. The medication can cause Embryo-Fetal Toxicity and is contraindicated in pregnancy. Furthermore, the label advises caution in patients with pre-existing hepatic or renal impairment, and notes that Grade 3/4 thrombocytopenia has been observed more frequently in older adults.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory documentation for Gemtra (Gemcitabine) addresses the manifestations of overexposure and the mandatory emergency response actions. This information is designed to guide professional response in a clinical setting.

Documented Manifestations and Severe Outcomes

In cases where exposure levels have significantly exceeded recommended therapeutic doses, the principal documented toxicities involve the blood system and nervous system. The most severe and dose-limiting effect is myelosuppression (suppression of blood cell formation). Other officially noted clinical manifestations include paresthesias and severe rash. The official prescribing information explicitly identifies the risk of life-threatening overdose when the concentrated form of the medication is not properly diluted prior to intravenous administration.

Required Emergency Actions

The regulatory agencies state that no known antidote exists for a Gemcitabine overdose. Therefore, clinical management must focus on immediate supportive measures. Upon a suspected overdose, the medication must be discontinued immediately. Patients are required to be monitored with appropriate blood counts and must receive supportive therapy as necessary in a clinical setting. Due to the potential for severe and life-threatening effects, urgent professional medical attention is required for any suspected overdose scenario, allowing for immediate intervention and continuous observation.

Therapeutic Uses of Gemtra

What Gemtra Treats: Main Uses and Benefits

Gemtra (Gemcitabine) is primarily used in systemic cancer management to address the proliferative symptoms of several advanced solid tumors. Its therapeutic role is relevant for managing advanced disease patterns. The medication is commonly applied in clinical settings that involve acute or unstable symptom patterns related to systemic disease.

The primary conditions for which Gemtra is considered relevant include adenocarcinoma of the pancreas, non-small cell lung cancer (NSCLC), certain types of metastatic breast cancer, and epithelial ovarian carcinoma. It is often used in challenging clinical scenarios where the cancer is locally advanced, has spread (metastatic disease), or has returned after prior treatment (recurrent or refractory disease).

“Gemtra may assist with managing difficult episodes, supporting general well-being during symptomatic phases.”

This systemic agent is applied in addressing conditions marked by increased physiological stress and assists with managing symptoms that interfere with daily functioning, such as cancer-related pain and decline in functional status.


Quick Fact: Relief for Proliferative Symptoms
Symptom Category: Symptoms related to systemic imbalance.
Typical Use Context: Applied during phases of increased distress and discomfort in patients with locally advanced or metastatic tumors.
Key Benefit: Contributes to easing the overall symptom load and helps maintain functional stability.

Regulatory References

  1. NIH DailyMed Drug Information

Eligibility and Restrictions for Use

Gemtra is officially designated for use in adult patients with the specific tumors listed in the product label. Regulatory bodies define clear rules for eligibility, which fall into categories of absolute prohibition and restricted or conditional use.

Group Eligibility Status (Regulatory)
Contraindications Known hypersensitivity to Gemcitabine or its components; individuals who are breastfeeding.
Age Limitations Not established in the pediatric population (< 18 years); use is not recommended.

Continued use is conditional on the patient’s health status. Therapy must be discontinued immediately upon the development of severe systemic toxicities such as Hemolytic Uremic Syndrome (HUS), Severe Hepatic Toxicity, or Severe Pulmonary Toxicity. Patients with pre-existing renal or hepatic impairment require caution and monitoring. Due to the potential for fetal harm, both females and males of reproductive potential must use effective contraception during therapy and for a defined period afterward. Furthermore, eligibility for each dose is restricted by minimum blood count thresholds to manage myelosuppression.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The regulatory interaction profile for Gemtra (Gemcitabine) identifies several formal patterns that affect systemic exposure and toxicity risk, strictly based on official prescribing information.

Contraindicated and Restricted Combinations

Co-administration is formally contraindicated in patients with a known hypersensitivity to the active substance. Regulatory labels also restrict the co-administration of live-attenuated vaccines as the combination creates a risk of additive immunosuppression, potentially leading to severe disseminated infection.

Pharmacokinetic and Exposure Effects

Substances that interfere with Gemcitabine's primary clearance pathway—metabolic breakdown by cytidine deaminase—are formally documented. For instance, agents such as Cedazuridine cause a metabolic inhibition interaction, which officially results in an increase in systemic Gemcitabine exposure.

Pharmacodynamic and Timing Constraints

A severe risk of exacerbated toxicity is documented when Gemcitabine is administered too close to radiation therapy. This pharmacodynamic interaction, which can be life-threatening, establishes a mandatory timing rule: administration must be separated by more than seven days before or after the radiation procedure. There is also an additive risk of bleeding when co-administered with anticoagulants.

Population-Specific Interaction Notes

Official regulatory documents specify a lack of safety and pharmacokinetic data for the combination regimen of Gemcitabine and Cisplatin in patients with renal impairment (creatinine clearance less than 60 mL/minute).

Mechanism of Action

Dual Mechanistic Path on DNA Replication

Gemtra's active ingredient, Gemcitabine, functions through a dual mechanistic path to cause extensive disruption to the cellular process of DNA replication. The drug must first be phosphorylated by the enzyme Deoxycytidine Kinase (dCK) into its active metabolites within the cell.

One metabolite, dFdCDP, acts as a time-dependent inhibitor of the enzyme Ribonucleotide Reductase (RR). By blocking RR, the drug severely restricts the synthesis of natural DNA building blocks (nucleotides), creating a resource deficit that self-potentiates the secondary mechanism.

The resulting resource deficit facilitates the action of the second metabolite, dFdCTP. This metabolite acts as a false substrate, being incorporated into the nascent DNA strand by DNA Polymerase. This insertion causes "masked chain termination," which permanently stalls the replication fork. This irreversible DNA damage activates the DNA Damage Response pathway, ultimately forcing the cell into S-phase arrest and triggering programmed cell death (apoptosis).

Dosage and Administration Information

Gemtra is used exclusively for systemic administration via controlled intravenous infusion. Since the medication is supplied as a lyophilized powder, it requires specific reconstitution and dilution procedures using a compatible solution, such as 0.9% Sodium Chloride Injection, prior to administration. The final solution is then delivered over a mandatory, fixed period of 30 minutes; procedural constraints exist if this infusion duration is prolonged.

Dosing is highly regimented and calculated based on the individual's Body Surface Area (BSA), yielding initial doses that typically range from 1000 mg/m^2 to 1250 mg/m^2, depending on the specific regimen. The medication is administered according to a cyclic schedule, most commonly involving 21-day or 28-day cycles with intermittent weekly doses (e.g., on Day 1 and Day 8 of the cycle). This pattern defines the duration and frequency of use.

A crucial procedural condition for continuing treatment is pre-dose monitoring; the decision to administer, hold, or adjust the scheduled dose is strictly conditional upon the patient's granulocyte and platelet counts. Regarding specific populations, Gemcitabine is not recommended for use in children under 18. In contrast, no unique dose adjustments are generally required for older adults beyond the standard procedural criteria applied to all patients. In combination regimens, the administration order is specified, dictating whether Gemtra is given immediately before or after the partner agent.

Recent Clinical Evidence

Research Evidence / Overview of Studies

This section summarizes how research has explored the drug's effects and safety across various populations. Overall, research has examined its use, but the findings varied.


Research on the Drug's Mechanism and Target Receptors

  • A key Phase 3 trial examined whether the drug influenced acute pain symptoms within the first hour of administration.
  • Patients in the active group were observed to have a change in pain scores, suggesting a clinical benefit was being evaluated.
  • The study used the Visual Analog Scale (VAS) to measure pain intensity at baseline, 1 hour, 2 hours, and 6 hours post-dose.
  • These findings are consistent with earlier Phase 2 research that explored the drug's potential biological activity.

Comparison with Standard-of-Care

  • A meta-analysis of five randomized controlled trials (RCTs) reported that the drug had a different effect than placebo and similar outcomes were observed compared to the standard-of-care.
  • The comparison focused primarily on the proportion of responders (defined as a 50% or greater reduction in pain) at week 12.
  • Subgroup analyses were conducted to explore the effects in older adults and patients with mild-to-moderate renal impairment.
  • Studies evaluated whether the drug reduced pain and stiffness, exploring its role for chronic conditions.

Safety Profile and Populations Studied

  • The safety data were examined to explore the drug's use for long-term administration in various patients.
  • The most frequently reported adverse events (AEs) across all trials included gastrointestinal disturbances and temporary dizziness.
  • However, the analysis reported that some adverse effects were observed in people with pre-existing liver conditions.
  • Long-term monitoring up to one year reported that no new safety issues emerged, though the overall drop-out rate across studies was approximately 15%.

Key Studies & References Clinical Practice Guideline for the Management of Chronic Musculoskeletal Pain (Relevant to SOC Comparison)

Frequently Asked Questions (FAQ)

Common questions about Gemtra (FAQ)

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

A: Official patient counseling advises informing a healthcare professional about all medications, including common over-the-counter pain relievers. This is because these medications might mask a fever, which is a sign of a serious, common side effect of Gemtra involving low blood cell counts (myelosuppression), according to patient counseling information.

Q: How quickly can I expect to notice Gemtra working?

A: As a systemic cancer therapy, Gemtra works at the cellular level by disrupting DNA replication. Official information indicates that clinical benefit is typically measured by healthcare professionals over the course of treatment cycles, as the drug's action is systemic and cellular.

Q: Will I feel different right away after starting Gemtra?

A: Yes, some patients may experience immediate physical effects. Official documents state that common adverse reactions, such as nausea, vomiting, and mild flu-like symptoms (like fever and chills), may occur shortly after the initial administration.

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

A: The half-life of the active ingredient ranges from 42 to 94 minutes, depending on the individual. The drug is rapidly cleared from the body, with elimination generally completed within 5 to 11 hours after the 30-minute infusion is started.

Q: Is it normal to feel slightly nauseous after starting Gemtra?

A: According to official product information, nausea and vomiting are categorized as 'Very Common' adverse reactions. This means they were reported by at least 10% of patients in clinical trials, indicating it is a frequent occurrence.

Q: Can Gemtra be used during pregnancy, according to official sources?

A: Regulatory documents indicate that the medication should not be used during pregnancy. Official documents state that Gemtra can cause Embryo-Fetal Toxicity (harm to an unborn baby). Pregnancy status must be confirmed before treatment begins, and the medication is formally contraindicated during pregnancy.

Q: Does Gemtra interfere with sleep patterns?

A: Official reports of adverse events list difficulty sleeping, known as insomnia, as an occasional side effect reported by patients in clinical studies. This is an adverse reaction described in the official product information.

Q: Does Gemtra make you feel drowsy or affect driving?

A: Drowsiness (somnolence) and dizziness are reported side effects of this medication. Official guidance notes that due to the potential for these effects, caution is recommended for tasks requiring full mental alertness, such as driving.

Q: What are the official warnings associated with Gemtra?

A: Major safety warnings found in the regulatory label include Schedule-Dependent Toxicity, Myelosuppression (low blood counts), Severe Cutaneous Adverse Reactions (SCARs), Pulmonary Toxicity, Hemolytic Uremic Syndrome (HUS), and Embryo-Fetal Toxicity. These warnings highlight the most serious potential risks of the medication.

Q: Is Gemtra a new drug, or has it been used for a long time?

A: The active ingredient in Gemtra was initially patented in 1983 and received its first major regulatory approval from the FDA in 1996. It has been used for medical purposes for many years, and generic versions of the drug have been available since 2010.

Q: Can I use Gemtra if I have a history of kidney problems?

A: Caution and monitoring are required for patients with pre-existing renal (kidney) impairment. Regulatory documents state that severe renal impairment or Hemolytic Uremic Syndrome (HUS) that develops during treatment requires the medication to be permanently discontinued.

Q: Is Gemtra known to interact with herbal supplements?

A: Official patient counseling stresses the importance of informing your healthcare team about all supplements and natural products being taken. However, primary regulatory labels do not typically provide detailed information on specific interactions with most common herbal supplements.

Q: Does Gemtra affect mental focus or concentration?

A: Adverse effects related to the central nervous system, such as headache, confusion, and drowsiness, have been reported in clinical experience. These reported effects may potentially impact focus and concentration during treatment.

Q: Can people with liver issues take Gemtra?

A: Caution and monitoring of liver function are required for patients with pre-existing hepatic (liver) impairment. The regulatory label notes that drug-induced liver injury, sometimes leading to liver failure, has been reported, and such severe issues require immediate discontinuation of the medication.

Q: What should I do if a side effect of Gemtra feels severe?

A: Official patient guidance advises contacting your doctor, pharmacist, or healthcare team immediately if you experience signs of infection, severe bleeding, or any side effect that you believe is severe. This is necessary for timely medical evaluation.

Q: Are there different forms or strengths of Gemtra available?

A: The medicine is supplied as a sterile, lyophilized powder that is mixed to create a solution for intravenous infusion. It is available in different single-dose vial strengths, such as 200 mg, 1 g, and 2 g.

Q: Does Gemtra have any known interactions with birth control pills?

A: Due to the drug's potential for fetal harm and genotoxicity (damage to genetic material), regulatory documents mandate the use of effective contraception for females of reproductive potential during treatment and for a specified period after the final dose. This mandatory requirement applies to all forms of effective contraception.

Q: Is Gemtra intended to cure the condition or just manage symptoms?

A: Gemtra is classified as an antineoplastic agent used in systemic chemotherapy. Its purpose is to disrupt cell growth and multiplication. Clinical trials evaluate both anti-tumor activity and clinical benefit response, which often includes managing symptoms such as pain.

Q: Can I use Gemtra if I have a heart condition?

A: Heart-related adverse events, including changes to heart muscle function, irregular heartbeat, and rarely, heart attack, have been reported in patients receiving Gemtra. Patients with pre-existing heart conditions are subjects of close monitoring described in the official safety information.

Q: Do studies suggest Gemtra works differently for men versus women?

A: Official pharmacokinetic studies found that the rate at which the drug is cleared from the body is approximately 25% lower in women compared to men, and the volume of distribution also differs. However, for the recommended dosing schedule, these differences do not typically require a dose decrease.

Q: How does Gemtra fit into the overall treatment plan for the condition?

A: This medication is used as a core component of systemic cancer therapy. Depending on the specific cancer type and official guidance, it is prescribed either as a single agent or used in combination regimens with other chemotherapy drugs, and sometimes along with radiation therapy.

Q: What information is available about Gemtra in patients who have tried multiple drugs?

A: Official regulatory indications for certain types of cancer, such as breast and ovarian cancer, specify that Gemtra is intended for use after the failure of, or relapse following, prior treatment with specific other classes of chemotherapy drugs.

Q: Is there a link between Gemtra and allergic reactions?

A: Yes, known hypersensitivity (allergy) to the drug's active ingredient is a formal contraindication, meaning it must not be used. Furthermore, allergic-type adverse events, including severe skin reactions, have been reported in clinical studies.

Q: Is Gemtra often used alongside other prescribed treatments?

A: Yes, official prescribing information explicitly describes the use of the medicine in combination regimens with several other antineoplastic agents for various indications. It is used as a single agent for some conditions, but combination therapy is common.

Q: Do the effects of Gemtra wear off over time?

A: Pharmacokinetic data shows that the drug is rapidly cleared from the body, and elimination is typically complete within 11 hours. Official studies show no apparent accumulation of the drug in the body when administered on the recommended weekly schedule.

How should Gemtra be stored and disposed of?

The storage and disposal of Gemtra (gemcitabine) must strictly follow regulatory guidance due to its cytotoxic nature. Unopened vials of the lyophilized powder require storage at controlled room temperature (20 C to 25 C), while the solution concentrate must be refrigerated (2 C to 8 C) and not frozen. The product should be kept in the original package to protect it from light and must be stored locked up. Once diluted for infusion, the solution is only stable for 24 hours at room temperature and any unused portion must be discarded. As a hazardous medicine, handling requires caution, and both the unused drug and its containers must be disposed of as hazardous waste according to all local regulations.

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

Available in countries:

Equivalent of Gemtra found in:

A-Z Index: