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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Brand Name
Indium Metallicum
Generic Name
Indium Metallicum
Active Ingredient
IndiumCategory
Copper-containing Intrauterine Device [EPC]
Variants
8
Different strengths and dosage forms
| Strength | Form | Route | NDC |
|---|---|---|---|
| 1 [hp_Q]/1 | PELLET | ORAL | 37662-0815 |
| 30 [hp_C]/1 | PELLET | ORAL | 37662-0810 |
| 6 [hp_C]/1 | PELLET | ORAL | 37662-0808 |
This page is for informational purposes only and does not replace medical advice. Before using any prescription or over-the-counter medication for Indium Metallicum, you must consult a qualified healthcare professional.
| 200 [hp_C]/1 | PELLET | ORAL | 37662-0812 |
| 12 [hp_C]/1 | PELLET | ORAL | 37662-0809 |
| 100 [hp_C]/1 | PELLET | ORAL | 37662-0811 |
| 1 [hp_M]/1 | PELLET | ORAL | 37662-0814 |
| 500 [hp_C]/1 | PELLET | ORAL | 37662-0813 |
Detailed information about Indium Metallicum
Indium is a versatile chemical element utilized in medicine primarily as a copper-containing intrauterine device (IUD) component and a diagnostic radiopharmaceutical. It belongs to several pharmacological classes including neuromuscular blockers and adrenergic agonists.
Dosage for Indium depends entirely on the clinical indication and the specific product being used. Because Indium is frequently administered as a medical device or a diagnostic agent, the "dose" is often a one-time application or a fixed-unit device.
Indium-containing IUDs are not indicated for use in pre-menarchal children (children who have not started their period). For diagnostic imaging, pediatric doses must be strictly adjusted based on weight (mg/kg) to minimize radiation exposure. Use in children for neuromuscular blockade is extremely rare and must be conducted under the direct supervision of a pediatric specialist.
Patients with impaired kidney function (reduced GFR) may require lower doses of systemic Indium. Because Indium is primarily excreted through the kidneys, decreased clearance can lead to accumulation in the bone marrow and liver. Healthcare providers will typically monitor creatinine clearance before administering injectable Indium.
No specific dosage adjustments are generally required for hepatic (liver) impairment when using an IUD. However, for systemic Indium, patients with severe liver disease should be monitored closely, as the liver is a secondary site of distribution.
Geriatric patients often have reduced renal function. Clinical studies suggest that Indium-111 should be used with caution in patients over 65, starting at the lower end of the dosing range to prevent nephrotoxicity (kidney damage).
Signs of systemic Indium toxicity or overdose include:
In the event of a suspected overdose, particularly with injectable forms, emergency medical attention is required. Treatment is primarily supportive and may include intravenous hydration and, in extreme cases, chelation therapy (using medication to bind and remove metals from the blood).
> Important: Follow your healthcare provider's dosing instructions exactly. Do not attempt to adjust your dose or remove a medical device without professional medical guidance.
When Indium is used as a component of an intrauterine device (IUD), the most common side effects are localized to the reproductive system. These symptoms often occur within the first 3 to 6 months of use as the body adjusts to the device.
Indium is a potent pharmacological agent that requires careful administration. Patients must be screened for metal hypersensitivity, specifically to copper and indium, before any device insertion or systemic administration. Because Indium acts as a Neuromuscular Blocker and Acetylcholine Release Inhibitor, it can theoretically potentiate the effects of other paralytic agents or medications that affect muscle tone. Always inform your surgical team if you have recently received an Indium-based diagnostic scan before undergoing anesthesia.
At this time, there are no FDA black box warnings for Indium. However, clinical guidelines emphasize that Indium-containing IUDs should not be used in patients with a history of current pelvic infection or certain cancers of the reproductive system.
Certain medications and conditions make the use of Indium dangerous.
Indium must NEVER be used in the following circumstances:
Indium is generally contraindicated during pregnancy. For the IUD form, it is classified as FDA Pregnancy Category X. If a patient becomes pregnant with an Indium IUD in place, the device should be removed immediately, as leaving it in increases the risk of spontaneous abortion, septic abortion, and preterm labor. For diagnostic Indium-111, the radiation exposure poses a risk of teratogenicity (birth defects), particularly during the first trimester. It should only be used in pregnant women if the potential benefit clearly outweighs the risk to the fetus.
Indium-containing IUDs are considered safe for use during breastfeeding. Studies show that the local release of metal ions does not significantly affect the composition or quantity of breast milk. However, for systemic Indium-111, the isotope is excreted in human milk. The CDC and FDA recommend that breastfeeding be suspended for at least 48 to 72 hours following a diagnostic scan to prevent the infant from ingesting radioactive material.
Indium acts through several distinct molecular pathways. In its role as a Copper-containing IUD, it functions by releasing metal ions into the uterine fluid. These ions increase the concentration of prostaglandins and white blood cells (macrophages) in the uterine lining, creating a sterile inflammatory environment that is lethal to sperm.
At the neurological level, Indium acts as an Acetylcholine Release Inhibitor. It competes with calcium ions at the presynaptic nerve terminals. By blocking the influx of calcium, Indium prevents the vesicles containing acetylcholine from fusing with the nerve membrane, thereby inhibiting the release of the neurotransmitter into the synaptic cleft. This results in a reduction of post-synaptic muscle activation, characterizing its effect as a Neuromuscular Blocker.
Common questions about Indium Metallicum
Indium is primarily used in two medical fields: reproductive health and diagnostic imaging. As a component of a copper-containing intrauterine device (IUD), it provides highly effective, non-hormonal contraception for up to 10 years by preventing sperm from reaching the egg. In nuclear medicine, the isotope Indium-111 is used to label white blood cells to help doctors find hidden infections or areas of inflammation. Additionally, it is used in specialized diagnostic tests for allergies to certain plants and foods. Your healthcare provider will determine which form of Indium is appropriate based on whether you need long-term birth control or a diagnostic scan.
The most common side effects depend on how Indium is administered. For those using an Indium-containing IUD, the most frequent issues include heavier menstrual periods, increased cramping, and spotting between periods, especially during the first few months. For patients receiving an Indium injection for a scan, common side effects include a metallic taste in the mouth, mild nausea, or a headache. Most of these symptoms are temporary and resolve as the body adjusts or the substance is cleared. If you experience severe abdominal pain or signs of an allergic reaction, you should contact your doctor immediately.
There is no direct chemical interaction between Indium and alcohol that would cause a dangerous reaction. However, alcohol can cause dehydration, which may put extra stress on your kidneys while they are trying to clear Indium from your system after a diagnostic scan. For IUD users, alcohol does not affect the device's ability to prevent pregnancy, but excessive drinking can sometimes worsen pelvic discomfort or inflammation. It is generally recommended to stay well-hydrated with water and avoid heavy alcohol use for at least 24 hours after any medical procedure involving Indium. Always consult your physician regarding your specific health status and alcohol consumption.
No, Indium is generally not considered safe during pregnancy. If you have an Indium-containing IUD and become pregnant, the device must be removed immediately by a professional to avoid serious complications like miscarriage or infection. For diagnostic scans using Indium-111, the radiation exposure is a concern for the developing fetus, particularly in the early stages of pregnancy. Doctors will usually only perform these scans on pregnant women in emergency situations where no other diagnostic tool is available. If you are pregnant or planning to become pregnant, you must inform your healthcare provider before any Indium-related procedure.
The onset of action for Indium depends on its use. An Indium-containing IUD is effective at preventing pregnancy immediately upon correct insertion by a healthcare provider. For diagnostic imaging, Indium-111 requires a 'waiting period' after injection—usually between 4 and 24 hours—to allow the substance to circulate and bind to the target cells in your body. If used for neuromuscular effects, the onset is typically within minutes of intravenous administration. Your doctor will provide a specific timeline based on the reason you are receiving the treatment or scan.
Since Indium is most often used as a long-term device or a one-time diagnostic dose, 'stopping' it usually means having the IUD removed. You can have an Indium IUD removed at any time by a healthcare professional, and your fertility will return to normal immediately. There are no withdrawal symptoms like those seen with hormonal medications or certain antidepressants. For diagnostic injections, the substance naturally leaves your body through your urine over several days. You should never attempt to remove an IUD yourself, as this can cause severe injury or infection.
Missing a dose is rare with Indium because it is not typically a daily medication. If you miss an appointment for an IUD insertion or a diagnostic scan, you should reschedule as soon as possible. In the case of diagnostic Indium-111, the material is radioactive and has a very short lifespan, so the pharmacy must prepare a fresh dose for your new appointment. If you are using an IUD and it falls out (expulsion), you are no longer protected against pregnancy and should use a backup method like condoms until you can see your doctor. Always follow the specific instructions provided by your medical facility.
There is no clinical evidence to suggest that Indium causes weight gain. Unlike hormonal birth control methods (like the pill or certain other IUDs), Indium-copper IUDs do not contain hormones that affect metabolism or appetite. Most patients using Indium for contraception do not experience changes in their body weight related to the device. If you notice significant weight changes while using an Indium IUD, it is likely due to other factors such as lifestyle, diet, or a different underlying medical condition. You should discuss any concerns about weight with your healthcare provider.
Indium can interact with certain other medications, so it is vital to share your full medication list with your doctor. It may interact with drugs that affect the kidneys, such as high-dose NSAIDs or certain chemotherapy agents, increasing the risk of kidney damage. Additionally, because Indium has neuromuscular blocking properties, it can enhance the effects of muscle relaxants used during surgery. For IUD users, blood thinners like Warfarin can lead to much heavier menstrual bleeding. Your pharmacist can check for specific interactions between Indium and your current prescriptions to ensure your safety.
Indium itself is a basic chemical element, but the medical products containing it are usually sold under specific brand names. While there are several manufacturers of copper-containing IUDs that may use Indium in their alloys, they are not always marketed as 'generic Indium.' Diagnostic Indium-111 is often produced by specialized radiopharmaceutical companies and may be available as a generic 'Indium In-111 Chloride' solution. The availability of lower-cost versions depends on your country and your insurance provider. Talk to your doctor or pharmacist to find the most cost-effective option for your specific medical needs.
> Warning: Stop using Indium-based products and call your doctor immediately if you experience any of the following serious symptoms:
Prolonged exposure to Indium, particularly in occupational settings or through long-term systemic use, can lead to a condition known as "Indium Lung" (interstitial lung disease). This is characterized by scarring of the lung tissue and progressive shortness of breath. While this is not typically associated with IUD use, it is a known risk for those inhaling Indium dust or vapors. Additionally, long-term use of copper-indium IUDs may lead to persistent changes in menstrual flow that require clinical monitoring to prevent chronic anemia.
No FDA black box warnings currently exist for Indium when used as a diagnostic agent or in standard IUD configurations. However, healthcare providers are required to warn patients about the increased risk of Pelvic Inflammatory Disease (PID) during the first 20 days following the insertion of any intrauterine device.
Report any unusual symptoms or persistent side effects to your healthcare provider immediately to ensure proper management and to determine if the medication or device should be discontinued.
If you are using Indium for long-term contraception or therapeutic purposes, your doctor may require the following tests:
Indium generally does not cause drowsiness or cognitive impairment. However, immediately following the insertion of an IUD, some patients may experience dizziness or fainting (vasovagal response). It is advised to wait at least 30 minutes after an IUD procedure before driving or operating heavy machinery.
There are no known direct interactions between Indium and alcohol. However, alcohol can increase the risk of dehydration, which may exacerbate the potential nephrotoxic effects of systemic Indium. It is generally recommended to limit alcohol consumption for 24 hours following an Indium-111 diagnostic scan.
Stopping Indium therapy depends on the form used. For an IUD, discontinuation involves a simple removal procedure by a doctor. Contraceptive effects cease immediately upon removal. There is no "withdrawal syndrome" associated with Indium, but patients may experience temporary cramping and spotting after the device is removed.
> Important: Discuss all your medical conditions, especially any history of pelvic infections or kidney disease, with your healthcare provider before starting Indium.
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking, including over-the-counter pain relievers and vitamins.
These conditions require a careful risk-benefit analysis by a physician:
Patients with a known allergy to Copper, Nickel, or Silver may experience cross-sensitivity to Indium. If you have ever had a skin rash or reaction to "costume jewelry" or dental fillings, you must undergo an allergy patch test before receiving an Indium-containing medical device.
> Important: Your healthcare provider will evaluate your complete medical history, including any history of heavy periods or metal allergies, before prescribing Indium.
In patients over 65, the primary concern with Indium is reduced renal clearance. As kidney function naturally declines with age, the half-life of systemic Indium increases, raising the risk of toxicity. Geriatric patients are also more susceptible to the neuromuscular effects of Indium, which can increase the risk of falls if muscle weakness occurs. IUDs are generally not used in post-menopausal women.
For patients with a GFR (Glomerular Filtration Rate) below 30 mL/min, systemic Indium should be used with extreme caution. There is no evidence that Indium is cleared by hemodialysis; therefore, patients on dialysis may require significant dose reductions or alternative diagnostic agents to avoid systemic metal poisoning.
While the liver is not the primary route of excretion, it is a major site of Indium distribution. Patients with Child-Pugh Class C (severe) hepatic impairment should be monitored for signs of hepatotoxicity. No specific dose adjustments are established for IUD users with liver disease, as the systemic absorption remains negligible.
> Important: Special populations, particularly pregnant women and those with kidney disease, require an individualized medical assessment before using any Indium-based product.
| Parameter | Value |
|---|---|
| Bioavailability | <10% (Oral), 100% (IV) |
| Protein Binding | 90-95% (primarily to Transferrin) |
| Half-life | 2.8 days (Physical In-111), ~14 days (Biological) |
| Tmax | 1-2 hours (Systemic) |
| Metabolism | Non-enzymatic; intracellular sequestration |
| Excretion | Renal 60%, Fecal 10%, Tissue retention 30% |
Indium is classified as a Post-Transition Metal. Within the therapeutic landscape, it belongs to the Copper-containing Intrauterine Device [EPC] class and the Radiopharmaceutical class. It is pharmacologically related to other heavy metals used in medicine, such as Gadolinium (used in MRIs) and Platinum (used in chemotherapy), though its specific mechanism of acetylcholine inhibition is unique among this group.