westadone

How long does Methadone Hydrochloride stay in your body?

The elimination half-life of methadone hydrochloride is about 8 to 59 hours (terminal/elimination half-life; a very wide range) — 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. This is the terminal (elimination) half-life after a single IV dose, distinct from the distribution phase. Methadone's only metabolite, EDDP, is explicitly INACTIVE per the label, so there is no active metabolite that outlasts the parent. However, methadone persists in the liver and other tissues and is released slowly, so its clinical duration of action can outlast plasma levels even though the number itself is a plasma half-life. Population effects the label names: the terminal half-life DECREASES during the 2nd/3rd trimesters of pregnancy (clearance rises), which can cause withdrawal. In hepatic impairment, methadone may ACCUMULATE with repeated dosing (metabolized in the liver), though PK was not extensively studied. In renal impairment, unchanged drug and metabolites are excreted to a variable degree and urine acidity affects elimination, but no half-life change is quantified. The label states methadone PK has NOT been evaluated in geriatric or pediatric populations.

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: Methadone Hydrochloride Injection label — DailyMed (Clinical Pharmacology, Pharmacokinetics: Excretion).

Frequently asked questions

What does Westadone treat?

Westadone (Methadone Hydrochloride) may be used to treat opioid-related disorders, intractable pain, 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 Westadone work?

Westadone is a opioid agonist. Opioid agonists bind opioid receptors (mainly mu receptors) on nerves in the brain and spinal cord, dampening the release of pain-signaling chemicals so fewer pain messages reach the brain, which relieves moderate to severe pain.

How is Westadone rated?

pharmaranks gives Westadone a composite score of 3.4 out of 5, currently based on 1 weighted source (FDA regulatory recall-safety data weighted highest). See our methodology at /how-we-rate.

How much does Westadone 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 $0.18 per ml, 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. Pharmacies pay less for a same-class option, Imodium A-D — about $0.05 on the same basis.

Is there a coupon or discount for Westadone?

pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Westadone. 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 Westadone?

Westadone is marketed by Sandoz. You can see Sandoz's full profile, rating, and other products on pharmaranks.

Is Westadone a brand-name or generic drug?

Westadone is a brand-name product with the active ingredient Methadone Hydrochloride. Lower-cost generic equivalents containing Methadone Hydrochloride are available — ask your pharmacist.

Is Westadone available over the counter?

No. Westadone 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 Westadone come in?

Westadone is currently marketed as tablet, effervescent, per the FDA's National Drug Code Directory.

What class of drug is Westadone?

Westadone is classified as opioid agonist, per the FDA's Established Pharmacologic Class.

Is Westadone FDA-registered?

Westadone is on record with the U.S. FDA under application number NDA017108. You can verify this on its official FDA label.

Has Westadone been recalled by the FDA?

Westadone has no FDA recalls recorded under its own application in the openFDA enforcement database. Its recall-safety score reflects its manufacturer's overall recall record. This is general reference, not medical advice — check the FDA recall database for the latest alerts.

Is Westadone safe?

There's no single safe-or-not verdict. pharmaranks gives Westadone a recall-safety score of 68/100, based on its FDA recall history (no recalls under its own FDA application) — not an efficacy or side-effect rating. Review its FDA-label side effects and warnings before use, and always consult a licensed professional.