Lymphoseek Generic: When Will It Be Available?

Dr. Brian Staiger, PharmD, BCPS

This page is aggregated from FDA records, court filings and company announcements. Coded and designed by

Updated October 9, 2026 How we build our data

Lymphoseek Generic at a Glance

Four quick answers from FDA records and our estimate.

  1. When is the first generic expected? January 2029 About 2.5 years away Why then?
  2. Has the FDA approved a generic? Unknown No FDA Orange Book record under this name
  3. When does the brand’s protection end? Unknown Not in the FDA record we could read
  4. Can you buy a generic today? Not yet No company lists one for sale

Explains

PharmD, BCPS · Clinical pharmacist Updated

Generic technetium tc-99m tilmanocept is expected to be available in January 2029, about 2.5 years away. None is for sale yet.

Why January 2029?

A patent that protects the brand runs out. After that, approved generics can be sold. We rate it probable: more likely than not, but it can still move.

Will the generic cost less?

Usually, but no company is recorded as having applied to make one yet, and a single company usually brings only a modest drop. See the price pattern

What should I do now?

Keep taking Lymphoseek as prescribed. When a generic arrives, your pharmacy may switch you to it automatically, and it may look different. What a generic means for you

Our month is only an estimate based on available information, so we never name a day.

Lymphoseek by the Numbers

Reason
Patent expiresA patent that protects the brand runs out. After that, approved generics can be sold.
How sure
Probable More likely than not, but it can still move.
Price competition
None filed yet No filers on record
Brand sales
Sales not reported

Lymphoseek’s Road to a Generic

The first generic of Lymphoseek is expected in January 2029.

Why that month: a patent that protects the brand runs out. After that, approved generics can be sold.

Brand alone on the market Approval date not in the Orange Book
Brand alone on the market First generic expected Swipe the chart sideways to see every year.

The bar shows Lymphoseek on the market on its own until the month we expect the first generic (the green band), a month and never a day. Its approval date and patents are not in the FDA Orange Book under this name, so the bar fades in from the left. The expected month comes from court records and company announcements.

Who Is Lined Up to Make Generic Technetium TC-99M Tilmanocept

Three steps stand between a brand and a generic you can buy: a company applies to the FDA, the FDA approves it, and the company starts selling it.

1

Applied to the FDA

No company is recorded as having applied to the FDA to make a generic Lymphoseek yet.

2

Approved by the FDA

We could not find Lymphoseek’s own record in the FDA Orange Book under this name, so the approved generic makers are not shown.

3

For Sale in Pharmacies

Not yet. No company lists a generic technetium tc-99m tilmanocept for sale with the FDA.

Sources: how many companies have applied, from court records and company announcements; approved generics from the FDA Orange Book; what is for sale from the FDA NDC Directory. The FDA does not disclose an application before it approves it (21 CFR 314.430).

Lymphoseek Price: What Pharmacies Pay and What Generics Usually Do

What a Generic Could Cost

How we estimate it. The national survey of what pharmacies pay (NADAC) has no recent price for Lymphoseek, so we cannot show dollars. Here is the FDA’s finding of how far the price pharmacies pay usually falls as generic companies join: about 31% with one company, 44% with two, 73% with four and over 95% with six or more (the typical drop for every drug whose first generic came out from 2015 to 2017).

Median prices pharmacies paid for the generic (invoice prices), compared with the brand’s price before generic entry, from FDA’s 2019 analysis “Generic Competition and Drug Prices”. At the manufacturer’s price FDA found steeper drops (about 39%, 54%, 79% and over 95%), the figures quoted elsewhere on this tracker. A typical pattern, not a price quote for this medicine.

What a Generic Lymphoseek Means for You

Nothing Changes Until It Is in Pharmacies

Until a generic is actually for sale, keep filling Lymphoseek as usual. When one arrives, there is nothing you need to sign up for.

Your Pharmacy May Switch You Automatically

Every state lets pharmacists fill a brand-name prescription with an FDA-approved generic rated as equivalent to it, and about 19 states require them to, unless your prescriber writes “dispense as written” or “brand medically necessary” on the prescription. Some states ask the pharmacist to tell you, or to get your OK first. A study of every state’s law has the details.

It Will Probably Look Different

US trademark law does not let a generic look exactly like the brand, so the color, shape or markings usually change. The active ingredient, strength and form are the same. An “authorized generic,” made by or for the brand’s own company, can look identical. The FDA explains.

Your Insurance May Change Too

Once a lower-cost version is available, many insurance plans charge more for the brand, or stop covering it. Your plan’s drug list (formulary) says how.

Until a generic is on US pharmacy shelves, be careful with websites that offer “generic Lymphoseek”. The FDA warns that unlicensed online pharmacies sell counterfeit and unapproved medicines; its BeSafeRx page shows how to check a pharmacy.

Ask a pharmacist about Lymphoseek

Questions people ask about Lymphoseek

Is there a generic for Lymphoseek right now?

No. As of October 9, 2026 no generic technetium tc-99m tilmanocept is listed for sale in the FDA NDC Directory.

When will Lymphoseek go generic?

January 2029 is the expected month, and that is probable but not certain. A patent that protects the brand runs out. After that, approved generics can be sold.

Will generic technetium tc-99m tilmanocept be the same as Lymphoseek?

Yes in the ways that matter: the same active ingredient, strength and form, with proof that it reaches your blood the same way. Inactive ingredients can differ, which is why some people notice a different look or taste.

How much will the generic cost?

Nobody can say for sure before launch. No company is recorded as having applied to the FDA to make one yet, and a single company usually brings only a modest drop.

Changes to This Projection

  • First generic expected January 2029 on this month’s schedule. A line is added here whenever a monthly update moves the month, the reason or how sure it is.

Every change to the expected month is logged here with the month we saw it.

Also Going Generic

All upcoming generics

About Lymphoseek

  • Generic name technetium tc-99m tilmanocept
  • How it is taken Injection under the skin or into the skin
  • Hard to copy Inhalers, injectables, patches and other hard-to-copy products. Fewer companies attempt them and dates slip more often.
  • More drugs Brand-name drugs starting with L
  • Have a question? A pharmacist answers, free. Ask about Lymphoseek

Sources. The expected month: FDA Paragraph IV Patent Certifications list, federal court records, company announcements and securities filings (settlement dates, launch plans, sales). The record on this page: FDA Orange Book, FDA NDC Directory, FDA, Generic Competition and Drug Prices (2019). Updated October 9, 2026. Information, not medical advice.