A consignment of pemetrexed 100mg can land on a Monday and still not be usable until the following week. The labeling requires the patient to take folic acid for at least five of the seven days before the first infusion, and to receive a vitamin B12 injection during that same week. Skip the preparation, and the first dose cannot go ahead as labeled. No other cytotoxic in a standard lung cancer regimen asks for a week of groundwork before it can be given, and it changes what a distributor needs on the shelf.

Pemetrexed 100mg Injection Uses and the Histology Rule

One sentence in the labeling disqualifies a large share of lung cancer patients, and most retail listings leave it out. Pemetrexed is not indicated for squamous cell or non-small cell lung cancer. Listings that say only lung cancer are describing a drug that cannot be given to a substantial group of lung cancer patients, and a tender written on that basis will be wrong.

The approved pemetrexed 100mg injection uses are narrower and specific. In nonsquamous non-small cell lung cancer, it is used with cisplatin as initial treatment, as maintenance after four cycles of platinum-based first-line chemotherapy without progression, and as a single agent after prior chemotherapy. In malignant pleural mesothelioma, it is used with cisplatin when the disease is unresectable or the patient is not a candidate for curative surgery.

Histology, therefore, decides whether this vial is relevant at all, which is unlike most cytotoxics, where the site of disease is the deciding factor. Centers running lung regimens hold it alongside platinum agents such as carboplatin 50 mg vial, and the pairing is why the two tend to move through a distributor together.

The Seven Day Head Start Before Dose One

Three things happen around the infusion rather than during it, and all three are in the dosing section rather than buried in a warning.

The reason is not caution for its own sake. Pemetrexed interferes with folate-dependent enzymes, and topping up folate and B12 stores first narrows the damage to normal dividing cells without blunting the effect on the tumor. The label puts numbers on it by comparing patients who were fully supplemented with those who were never supplemented.

Severe vomiting ran at under a third of the unsupplemented rate. Febrile neutropenia dropped from 9 percent to 1 percent, and infection alongside severe neutropenia dropped from 6 percent to none. Two caveats belong with those figures: the unsupplemented group was small at 32 patients, so this is a comparison within a trial rather than a randomized test of vitamins, and the label notes that hypertension, chest pain, and thrombosis were reported more often in the supplemented group. The direction of the toxicities that put patients in the hospital is still unmistakable.

For anyone supplying this product, that table is also a purchase order. A center starting a patient on pemetrexed needs a B12 injection in hand a week earlier, which is why buyers assembling an oncology line often take methylcobalamin injection in the same order. The prescriber decides the exact B12 form and strength, and a supplier who can cover both the cytotoxic and the vitamin B12 injections around it removes a sourcing gap that otherwise sits with the pharmacy.

Why Orders Pair 100 mg Vials With 500 mg

The dose is 500 mg per square meter infused over 10 minutes on day 1 of each 21-day cycle, and the arithmetic explains the vial mix better than any stocking rule.

Worked example. A patient with a body surface area of 1.7 square meters needs about 850 mg. One 500 mg vial covers most of it, and the remaining 350 mg comes from the smaller vials, so the dose draws on four 100 mg vials with part of the last one discarded, since these are single-use presentations. Change the patient size and the mix changes, but the pattern holds: the 500 mg vial carries the bulk, and the 100 mg vial makes up the number. This illustrates how doses convert into vials and is not a dosing instruction.

Two consequences follow for purchasing. The 100 mg moves in greater unit numbers than its share of milligrams suggests, so ordering the two strengths in equal counts leaves the small vial short. And because the remainder is discarded, wastage on this product is a function of patient size rather than of handling, which is worth knowing before anyone reads a usage report as a storage problem.

Pemetrexed Injection IP 100mg Side Effects

Bone marrow suppression leads, and the supplementation table above is the best guide to how much of it is avoidable. Among fully supplemented patients on pemetrexed with cisplatin, grade 3 or 4 neutropenia was reported in 23 percent, vomiting in 11 percent, thrombocytopenia in 5 percent, and diarrhea in 4 percent. Blood counts are checked before each cycle.

Rash is the reason dexamethasone sits in the schedule. Oral dexamethasone 4 mg twice daily on the day before, the day of, and the day after each infusion is prophylaxis rather than treatment, which means it has to be dispensed in advance alongside the vial. A patient who arrives without it has a problem the pharmacy cannot solve on the day.

Fatigue, nausea, and mouth soreness make up most of the remaining Pemetrexed Injection IP 100mg side effects. The hypertension, chest pain, and thrombosis reported more often in supplemented patients in the label comparison belong on the monitoring sheet too, since they run against the pattern of everything else in that table and are easy to overlook for that reason.

Kidney Function and the NSAID Window

Pemetrexed is cleared by the kidneys, so renal function is a gate rather than a caution. The labeling directs that it not be given when creatinine clearance falls below 45 mL per minute. Above that, function still shapes the surrounding schedule.

Painkillers are where this bites in practice. NSAIDs reduce renal clearance and can raise exposure, so short half-life NSAIDs are avoided for 2 days before, the day of, and 2 days after each infusion, and longer half-life agents are interrupted for at least 5 days before, the day of, and 2 days after. Caution applies to NSAIDs generally once clearance drops below 80 mL per minute. Patients rarely consider an over-the-counter tablet worth mentioning, which is why this belongs on the patient counseling sheet rather than only in the prescribing information.

Reconstitution, Diluent, and Storage

The 100 mg vial takes 4.2 mL of preservative-free 0.9 percent sodium chloride injection, giving 25 mg per mL, and is then diluted further in the same solution to a total volume of 100 mL. Calcium-containing diluents such as Lactated Ringer solution are not used. Reconstituted and infusion solutions are stable for up to 24 hours, refrigerated or at room temperature, which gives a pharmacy a workable preparation window.

Storage before use is the easy part, and worth stating clearly because buyers often assume otherwise with a cytotoxic. Unopened vials sit below 25°C, with excursions permitted between 15 and 30°C, so nothing about this product needs refrigerated transport on the way in. The fridge only enters after preparation, and only when the prepared dose is not infused straight away.

Pemetrexed Injection IP 100mg Price

At the time of writing, a 100 mg vial from an Indian brand was listed on a national pharmacy site at about 797 rupees against a maximum retail price of 857 rupees, with the page noting it does not sell the product online. Treat that as a reference point for the retail ceiling rather than a trade rate, and remember the full dose costs several multiples of it once the 500 mg vial is added.

Quantity matters here more than on a high-value specialty vial, because the Pemetrexed Injection IP 100mg price sits at a commodity level and the cost base is dominated by cytotoxic handling at the plant: containment, dedicated or campaigned areas, and operator protection. Lyophilization adds to it. Quotes are issued per order against quantity, pack configuration, and destination market, and the mechanics are the same ones set out in how third-party manufacturing works.

Pemetrexed 100mg Injection Manufacturer in India

Torso Healthcare is a WHO GMP-certified injectable manufacturer based in Baddi, Himachal Pradesh, supplying hospitals, distributors, and franchise partners across India and export markets. A buyer evaluating a pemetrexed 100mg injection manufacturer in India is usually weighing three things: whether cytotoxic products run in a dedicated area, how lyophilization consistency is demonstrated between batches, and whether the supplier can cover the supporting products in the same regimen. The last one is where a wider oncology range and a nutraceutical manufacturing capability change the conversation, because the vitamins around this drug are not optional extras.

Dossier support and batch documentation are shared on request, under standard third party supply terms and on the same footing offered to franchise partners.

Hospitals, distributors, and franchise partners sourcing pemetrexed 100mg in bulk, or building their own label lung oncology line around it, can request a quotation with the strengths, quantity, and destination market, and Torso Healthcare will reply with current rates and lead times.

Indications, supplementation schedule, dosing, renal limits, reconstitution, storage, and safety data on this page follow the FDA prescribing information and the DailyMed product label.

Frequently Asked Questions

Why must vitamins start a week before the first dose?

Because pemetrexed acts on folate-dependent enzymes, and replenished folate and B12 stores protect normal dividing cells. The labeling asks for at least five folic acid doses in the seven days beforehand and a 1000 mcg B12 injection during that week. In the label comparison, febrile neutropenia fell from 9 percent to 1 percent.

Can pemetrexed be used for squamous lung cancer?

No. The labeling states it is not indicated for squamous cell or non-small cell lung cancer. The approved lung indication covers nonsquamous disease only, in the initial, maintenance, and second-line settings described in the labeling.

How many 100 mg vials does one dose need?

It depends on patient size. At 500 mg per square meter, a patient of around 1.7 square meters needs roughly 850 mg, which draws on one 500 mg vial plus about four 100 mg vials. The small vial is what makes the number up, so it moves in higher unit counts than the milligram split suggests.

Why can Lactated Ringer’s solution not be used to dilute it?

Because it contains calcium. The labeling directs reconstitution and dilution with preservative-free 0.9 percent sodium chloride only, and says calcium-containing diluents should not be used. Getting this wrong at the pharmacy wastes the vial rather than merely delaying the dose.

When does a patient need to stop taking painkillers?

Short-acting NSAIDs are avoided for 2 days before, the day of, and 2 days after the infusion. Longer acting ones are interrupted for at least 5 days before, the day of, and 2 days after. The concern is renal, since pemetrexed clearance depends on kidney function.

Can the vial be supplied under our own brand?

Yes, subject to the product being in the current manufacturing range. Own label supply covers brand name and carton artwork, with batch documentation including a certificate of analysis sent with each consignment.

Disclaimer: This page is intended for pharmaceutical businesses, trade buyers, and healthcare professionals as product reference information only. It is not an advertisement to the public, not medical advice, and not a recommendation for treatment. Pemetrexed is a prescription cytotoxic medicine and must be prescribed and administered only under qualified medical supervision.