Sodium Thiosulfate Injection: A Comprehensive Review

Overview

Sodium thiosulfate injection has been recognized for its therapeutic attributes in downturning the propensity for Cisplatin-induced ototoxicity. However, despite corresponding chemical formulations, not all Sodium thiosulfate injection products are instituted for this indication. Only a particular pharmaceutical company’s sodium thiosulfate injection formulation has been entitled to the Food and Drug Administration (FDA) acceptance and authorization for those who are inclined to Cisplatin-induced ototoxicity. Cisplatin is often employed to combat certain cancers or tumors. However, it does bring out potential health crises like hearing issues. So, in such cases where the propensity for Cisplatin-induced ototoxicity is being underscored, Sodium thiosulfate injection could be instituted as a proactive strategy.

Drug Group:

Sodium thiosulfate injection is classified under the antidote drug group. Antidotes are medicines employed to counter the toxicity inflicted by other pharmacological agents.

Available Doses and Dosage Forms:

• Dosage Form: Sodium thiosulfate injection formulation.

• Available Dose: 125 milligrams of Sodium thiosulfate per milliliter of the injection formulation.

For Patients:

What Is Cisplatin-Induced Ototoxicity?

Cisplatin, though, being denominated as a cancer therapeutics, tends to bring out derangements in certain organs and organ systems. However, it is often instituted due to its therapeutic attributes in palliating cancerous growth. Cisplatin-induced ototoxicity is the broad denomination that entails all ear problems Cisplatin therapy instigated. The intensity and gravity of the hearing issue tend to differ, ranging from minor hearing issues like tinnitus (encountering ringing sound in the ear) to hearing loss. It gravitates with the therapy duration and the Cisplatin dosage that is employed. When employed for a protracted period, Cisplatin-based medications could inflict irrevocable hearing impairments. Therefore, it is advocated to adopt and take up measures that could palliate the propensity for Cisplatin-induced ototoxicity, particularly when the patient's health does not favor and cannot accommodate the withdrawal or elimination of Cisplatin from their cancer therapeutics.

How Does Sodium Thiosulfate Injection Work?

Sodium thiosulfate injection can palliate and downturn the gravity of Cisplatin-induced ototoxicity. Cisplatin could release free radicals (reactive molecules that could mutilate cells) for cancer therapy. Certain sensitive and critical cells in the ear are mutilated and eliminated through these free radicals, prompting hearing loss and ototoxicity. Sodium thiosulfate injection mutes and masks free radical activity, thus safeguarding those cells. In addition, Sodium thiosulfate injection also down-regulates the ear cells’ Cisplatin proportion, thus reducing the prospects for ototoxicity.

What Is the Dose of Sodium Thiosulfate Injection?

The Sodium thiosulfate injection dosage is piloted primarily by two discrete parameters:

• The patient’s body surface area.

• Their corresponding body weight.

For patients under five kilograms (11.02 pounds), the Sodium thiosulfate injection dose ought to be kept at 10 grams per square meter of body surface area, for those whose body weight ranges between five (11.02 pounds) and 10 kilograms (22.04), 15 grams per meter square of body surface area must be delivered. Finally, for those over 10 kilograms (22.04) of body weight, the Sodium thiosulfate injection dosage must be heightened to 20 grams per square meter of body surface area.

How Effective Is Sodium Thiosulfate Injection?

The propensity for Cisplatin-induced ototoxicity could be appreciably downturned with Sodium thiosulfate injection therapy. The effectivity attributes elicited by Sodium thiosulfate injection were highly appreciable in younger aged ones, which underscored the relevance of Sodium thiosulfate injection therapy in pediatric cancer patients. With prompt Sodium thiosulfate injection therapy, permanent and irrevocable hearing issues that Cisplatin therapy would have prompted can be palliated.

What Are the Things to Inform the Doctor Before Taking the Drug?

• Sodium Thiosulfate Allergy: Allergic encounter with Sodium Thiosulfate injection or other formulations.

• Drug Allergy: Allergic encounter with any medicaments, particularly of the related drug group.

• Medical History: Medical background and health status of the one for whom the medicine has to be advocated.

• Drug History: Medicinal therapies, such as pills or creams, are being followed.

• Dietary Supplements: Any routine dietary supplements, herbal ones, or over-the-counter medicaments.

• Pregnancy: Current pregnancy status and plan.

• Lactation: Currently having a breastfed baby.

How Is Sodium Thiosulfate Injection Administered?

The intended Sodium thiosulfate injection dose that is appropriate and judicious for the person should be figured out and computed. The injection solution that could render the stipulated Sodium thiosulfate dose must be drawn out from the vial with a syringe. Empty and flush out the syringe content into an infusion bag. Sodium thiosulfate could be delivered into the vein (intravenous infusion). Sodium thiosulfate delivery has to be carried off once the Cisplatin infusion is concluded.

What Are the Side Effects of Sodium Thiosulfate Injection?

Sodium thiosulfate injection therapy might bring out adverse and unpleasant outcomes like:

• Skin rashes.

• Bumps in skin.

• Chest tightness.

• Nausea.

• Weak and failing muscles.

• Restlessness.

• Noisy breathing (wheezing).

• Troubled breathing.

• Facial swelling.

• Exhausted feeling.

• Vomiting.

Dietary Considerations:

Sodium thiosulfate injection therapy does not necessitate dietary modifications. However, the doctor might sometimes institute such alterations, prompted by the person’s general health status or concomitant medical situations.

Missed Dose:

Sodium thiosulfate injection is employed after a Cisplatin infusion. The infusion is executed by medical personnel, so the propensity for missing a Sodium thiosulfate injection is appreciably minimal. However, if encountered, the missed dose should be addressed and attended to by the medical team as soon as possible.

Overdose:

Sodium thiosulfate injection dose ought to be precisely formulated per the person’s body weight and surface area. Discrepancies in Sodium thiosulfate could either turn down the medicine’s potency or heighten the gravity for overdose. Overdosing with Sodium thiosulfate might deepen and augment the adverse outcomes. The poison control center ought to be approached to get it attended immediately.

Storage:

• Storage Condition: In glass vials.

• Storage Temperature: 20 to 25 degrees Celsius (68 to 77 degrees Fahrenheit).

For Doctors:

Indications:

Sodium thiosulfate uses are advocated for:

• Those going through Cisplatin therapy for non-metastatic and localized solid tumors with a greater propensity for Cisplatin-induced ototoxicity.

• Cyanide poisoning or toxicity.

Dose:

Body surface area and body weight are the integrant elements that govern the dosage of Sodium thiosulfate injection.

• Body Weight Under Five Kilograms (11.02 Pounds): 10 grams of Sodium thiosulfate per meter square (g per m2).

• Body Weight Between Five (11.02 Pounds) to 10 Kilograms (22.04): 15 g per m2.

• Body Weight Over 10 Kilograms (22.04 Pounds): 20 g per m2.

Dosing Considerations:

Normalcy in the person’s serum sodium proportion should be ascertained before sodium thiosulfate therapy's inception. The therapeutic efficacy of Sodium thiosulfate injection might be reduced when it is delivered after Cisplatin infusions that exceed six hours. Even before Sodium thiosulfate is delivered, the Cisplatin might have already brought about irrevocable changes and cellular mutilation.

What Are the Pharmacological Aspects of Sodium Thiosulfate Injection?

1. Mechanism of Action:

Cisplatin therapy could invoke harm and mutilate the cochlear hair cells, prompting ototoxicity. The reactive oxygen species (ROS) brought out by Cisplatin therapy are accountable for hair cell mutilations. In addition, Cisplatin therapy could also instigate direct DNA (deoxyribonucleic acid) alkylation. DNA alkylation and ROS pull for cochlear hair cell destruction, prompting irrevocable hearing issues.

Sodium thiosulfate potentially shuts off the Cisplatin’s potency in inflicting cochlear hair cell destruction. Sodium thiosulfate directly clings onto the Cisplatin and thereby structures a non-functional platinum complex, which is not capacitated to reduce cochlear hair cell harm. In addition, Sodium thiosulfate upscaled the glutathione proportion within the cells and simultaneously palliated the oxidative stress that the Cisplatin therapy has inflicted intracellularly. It is through sodium sulfate cotransporter 2 that Sodium thiosulfate gets channeled into the cell, which enables it to bring out its actions intracellularly.

2. Pharmacodynamics:

Sodium thiosulfate injection downturns the ROS proportion by enhancing and augmenting the antioxidant level. Apart from that, Sodium thiosulfate up-regulates the sodium proportion in the body. Within one hour after Sodium thiosulfate introduction, the sodium load tops by six millimoles per liter. However, sodium level inflation returns to normal in the following 18 to 24 hours.

3. Pharmacokinetics:

Sodium thiosulfate expresses appreciable bioavailability owing to its intravenous introduction. It streams through the circulation and also channels into the extracellular spaces. However, Sodium thiosulfate’s tissue dissemination is minimal, which downturns the volume of distribution. Thiosulfate reductase and thiosulfate sulfurtransferase bring out the metabolic activity of Sodium thiosulfate by fragmenting the molecules into sulfite. Certain oxidative processes bring out the transfiguration of these sulfites into sulfates. However, only a minimal proportion of sodium thiosulfate is put into these metabolic activities. Meanwhile, more sodium thiosulfate is discharged and flushed off through the urinary path in its original chemical structure.

Toxicity:

The carcinogenicity attributes of Sodium thiosulfate have yet to be mapped, and no relevant study reports have been cataloged on it. Ames assay elicited a negative response for Sodium thiosulfate’s mutagenic attributes. The impact that Sodium thiosulfate could have on fertility is still unclear.

Clinical Studies:

1. Sodium Thiosulfate Clinical Trials: Randomized, open-label, multicentric, and controlled study (COG ACCL0431 and SIOPEL 6).

2. Inclusion Criteria:

• One month to 18 years.

• Going through chemotherapy with Cisplatin.

3. Study Arms:

• Cisplatin alone arm.

• Cisplatin with Sodium thiosulfate injection arm.

4. Study Outcomes: The Cisplatin with Sodium thiosulfate injection arm showed an appreciable decline in ototoxicity encounters compared to those in the Cisplatin alone arm. The degree of hearing loss also brought about notable palliation in this particular study group. Sodium thiosulfate’s acceptable safety attributes underscored the therapeutic pertinence in susceptible patients.

Contraindications

• Allergic to Sodium thiosulfate.

Warnings and Precautions:

• Hypernatremia: Sodium thiosulfate injection could gravitate and upscale the body’s sodium load. Thereby, it heightens the inclination for hypernatremia. The sodium load inflicted by Sodium thiosulfate is governed by the dosage of the medication being instituted.

• Hypokalemia: Sodium thiosulfate injection therapy deepens the propensity for hypokalemia. Therefore, the person’s serum potassium proportions should be tracked throughout the therapy to ascertain normalcy. Around 15 to 27 percent elicited hypokalemia with Sodium thiosulfate injection therapy, which underscores the medicament's gravity in invoking depletion in potassium levels.

• Hypersensitivity: Sodium thiosulfate injection can invoke hypersensitivity reactions. Eight to 13 percent of cases expressed overstated reactivity issues with Sodium thiosulfate therapy. Abrupt withdrawal of Sodium thiosulfate is warranted upon spotting any hypersensitivity issues. Glucocorticoids or antihistamines could be considered before Sodium thiosulfate injection for stipulated cases. The sodium sulfite in sodium thiosulfate gravitates to the drug’s potential to evoke exaggerated reactivities or anaphylaxis.

• Vomiting: Sodium thiosulfate injection could invoke vomiting and nausea. Seven to 85 percent of cases expressed vomiting with Sodium thiosulfate therapy. Antiemetics could be instituted beforehand to palliate the gravity of vomiting.

Drug Interactions

Sodium thiosulfate’s therapeutic attributes could be palliated and downturned concurrently delivered with Hydroxocobalamin. When instituted simultaneously, sodium thiosulfate and iron supplements downturn iron uptake owing to the complexing of Sodium thiosulfate with iron.

Specific Considerations:

1. Sodium Thiosulfate Injection During Pregnancy: Sodium thiosulfate injections are routinely not advocated for expectant women as the drug behaviors in expectant women have not been concluded. So, the anticipated risk that Sodium thiosulfate injection could bring out and the therapeutic necessity for the expectant women should be considered and weighed while advising it. Sodium thiosulfate injection is employed to palliate the ototoxicity that Cisplatin therapy could invoke. However, Cisplatin is labeled to be unsafe in expectant women. This downstream the pertinence of Sodium thiosulfate injection therapy in expectant women.

2. Sodium Thiosulfate Injection During Breastfeeding: The potential interference and trouble that Sodium thiosulfate could cause during lactation are not being scrutinized and explored much.

3. Sodium Thiosulfate Injection in the Pediatric Population: Sodium thiosulfate injection therapy’s potency and safety attributes have been thoroughly explored in the pediatric population. It could be employed for pediatric ones (from one month of age) with no-metastatic and localized solid tumors, which are instituted for Cisplatin therapy.

4. Sodium Thiosulfate Injection in Renal Impairment: Renal impairment does not necessitate downregulation in Sodium thiosulfate dosage. However,potassium and sodium proportions should be meticulously tracked to pin down hypernatremia, hypokalemia, or both.