reditrex

How long does Methotrexate stay in your body?

The elimination half-life of methotrexate is about 3 to 10 hours — the time it takes the body to clear about half of it. As a rule of thumb, a medicine is mostly gone after roughly 4 to 5 half-lives, though this varies from person to person with age and kidney or liver function. The 3-to-10-hour figure is for the low weekly doses used in rheumatoid arthritis, psoriasis, and low-dose cancer therapy (under 30 mg/m2). After high-dose intravenous methotrexate the terminal half-life is longer, 8 to 15 hours. Methotrexate leaves the bloodstream faster than it leaves the body's tissues: inside cells it is converted to methotrexate polyglutamates, active metabolites that the FDA label says "may remain in tissues for extended periods," with retention varying by tissue and tumor — the label gives no half-life number for them. A second active metabolite, 7-hydroxymethotrexate, is also formed in smaller amounts; the label states no half-life for it either. The drug is cleared mainly by the kidneys, and the label states that the elimination half-life increases with the severity of kidney impairment, with wide variation between individuals — relevant to older adults, whose kidney function declines with age. The effect of liver impairment on methotrexate pharmacokinetics is unknown per the label. There is no extended-release form of methotrexate; oral tablets, oral solution, and subcutaneous auto-injectors are all immediate-release.

This is general information, not medical advice. It doesn’t tell you when a drug test would read negative (tests detect substances for different, often longer, windows) or when it’s safe to take another dose — ask your pharmacist or prescriber. Source: Methotrexate Injection — FDA Prescribing Information, Section 12.3 Pharmacokinetics (DailyMed).

Frequently asked questions

What does Reditrex treat?

Reditrex (Methotrexate) may be used to treat juvenile arthritis, rheumatoid arthritis, breast neoplasms, choriocarcinoma, crohn disease, esophageal neoplasms, based on NIH RxClass drug-classification data (conditions a drug may treat — not a verbatim copy of the FDA-approved label). This is general reference, not medical advice.

How does Reditrex work?

Reditrex is a folate analog metabolic inhibitor. Folate analog metabolic inhibitors like methotrexate block the enzyme that converts folate into its usable form, starving fast-dividing cells of the building blocks for DNA. At low doses they also calm an overactive immune system and reduce inflammation.

How much does Reditrex cost?

Nobody can tell you what you will pay — your price is set by your insurer's formulary, your deductible and the pharmacy's markup, and none of those are published. What IS published is what the pharmacy paid to acquire it: about $4.92 for 30, per the CMS NADAC survey. Treat that as the floor, not the quote — ask the pharmacist for the cash price as well as your copay, because for cheap generics the cash price often wins.

Is there a coupon or discount for Reditrex?

pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Reditrex. To pay less, ask your prescriber or pharmacist whether a generic equivalent exists, check the manufacturer's copay/savings card and patient-assistance program, and compare a pharmacy discount card against your insurance copay. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.

Who makes Reditrex?

Reditrex is marketed by Nordic Grp. You can see Nordic Grp's full profile, rating, and other products on pharmaranks.

Is Reditrex a brand-name or generic drug?

Reditrex is a brand-name product with the active ingredient Methotrexate.

Is Reditrex available over the counter?

No. Reditrex is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.

What forms does Reditrex come in?

Reditrex is currently marketed as solution, per the FDA's National Drug Code Directory.

What class of drug is Reditrex?

Reditrex is classified as folate analog metabolic inhibitor, per the FDA's Established Pharmacologic Class.

Is Reditrex FDA-registered?

Reditrex is on record with the U.S. FDA under application number NDA210737. You can verify this on its official FDA label.