A cancer drug 'works.' But did patients live longer, or did a tumor just shrink? The answer is which endpoint the trial made its primary measure. Here is how to read it.
Only one number proves a cancer drug helps patients live longer, and that is overall survival. Progression-free survival, response rate, and pCR are faster stand-ins that may or may not convert. A plain guide to reading a trial's primary endpoint, the hazard ratio, the survival curve, and the surrogate-endpoint trap, with real trials from KEYNOTE-189 and daraxonrasib to the INTerpath-001 mRNA vaccine.
How RAS went from "undruggable" to Rasonque, the first RAS-targeted medicine to extend survival in pancreatic cancer, and the best reporting and science behind it.
For 40 years RAS was "undruggable." On August 26, 2026 the FDA approved daraxonrasib (Rasonque), the first broad RAS-targeted medicine for metastatic pancreatic cancer, after the RASolute 302 trial nearly doubled overall survival (13.2 vs 6.7 months, HR 0.40). The discovery, the data, the approval, and what comes next, told through the best reporting and science, each tagged free, open-access, or subscription.
Several companies want to stretch IBD antibodies from a shot every few weeks to one every three months, or even six. Keeping the drug in the blood that long is the easy part. Whether the disease stays controlled right up to the next dose is the hard part, and the bet the newest programs are making.
“Long-acting” hides three claims: the drug stays in the blood (PK), keeps blocking its target (PD), and keeps the disease controlled (durability). Only the last proves a long interval works. Across 1,147 IBD trials, TL1A is the most crowded emerging target, with 7 antibodies, 6 sponsors and 36 trials, and 3 already in Phase 3. The leading long-acting candidates report 56–85 day half-lives, a 3–5× leap. But the trough, how much drug is left at the next dose, tells the real story: at the proposed quarterly and six-month intervals it sits at roughly 19–47% of peak, inside the range today’s biologics already tolerate. The PK was never the wall; durability is, and only XmAb942 is yet testing a long interval in patients.
Two of the newest PsA drugs block IL-17F as well as IL-17A; the older ones block only IL-17A. A plain walk through what the extra target actually buys: clear help on the skin, no proven help on the joints yet, and a fungal cost in the middle.
Sonelokimab met its Phase 3 endpoint in psoriatic arthritis in August 2026, the second drug engineered to neutralise IL-17F alongside IL-17A. The first, bimekizumab, is already approved; secukinumab and ixekizumab block IL-17A alone. On the joints, the dual drugs post ACR50s around 43–44% versus 35–40% for the A-only incumbents — but the trials aren't comparable, so the gap isn't proof. On the skin the story firms up: PASI90 around 61–69% versus 33–49%, plus a head-to-head in psoriasis where bimekizumab out-cleared secukinumab. Blocking IL-17F looks like a skin benefit, not yet a joint one.
The TNF receptor superfamily has produced fifteen approved medicines, and every one of them works by shutting something down. Six receptors have been pushed the other way for twenty years, and not one agonist antibody has been approved.
Adalimumab, etanercept, denosumab and belimumab target different ligands, but they all modulate signalling through the TNF receptor superfamily, and every one works by turning a pathway off. For about twenty years the field has also tried the opposite, activating CD40, OX40, 4-1BB, GITR, TRAIL-R and CD27 with agonist antibodies. That has produced nothing approved, in the United States or Europe. These receptors only signal when several copies are clustered into a particular arrangement, and the clustering has to be supplied by the patient's own FcγRIIB, so potency depends on the tissue as much as on the molecule. Romiplostim shows agonism is not impossible — its receptor just asks for something a two-armed drug can deliver.
The scan that finds it is quick, safe, and has been around for years. Almost no cardiologist used it until a drug gave them a reason to look.
A non-invasive scan could spot ATTR cardiac amyloidosis, a common, deadly, long-overlooked cause of heart failure in the elderly, years before doctors used it. Diagnoses only surged after tafamidis (Vyndaqel) was approved for the heart in 2019. The treatment didn't create the disease; it created the diagnosis. The backstory, the economics, and why it matters.
Prometheus gave IBD its best shot at oncology-style patient selection: a companion diagnostic for its anti-TL1A drug, tulisokibart. Merck paid $10.8 billion, then built its Phase 3 trials to enroll everyone. The more crowded the anti-TL1A field gets, the stronger the case for a precision-medicine approach, even as the science has yet to deliver one.
Prometheus built a companion diagnostic to pick the ulcerative colitis patients its anti-TL1A antibody tulisokibart would help, and Merck bought the company for $10.8B. But when Merck launched the Phase 3 program in 2023 (soon after the acquisition), it chose to enroll everyone and demote the test to a secondary endpoint, a design choice fixed years before the trials read out. The now-positive Phase 3 confirms it, and the rest of the anti-TL1A class (Roche, Sanofi/Teva, Spyre, the newly-launched Bionyra) competes on potency and half-life, not patient selection. Yet the more crowded the field gets, the stronger the case for a precision-medicine approach, even as the science has yet to deliver it.
Of 214 industry IBD trials terminated or withdrawn over two decades, only ~23% stopped for efficacy or safety. The rest ran out of patients, money, or corporate priority — the trial failed, not the biology.
We read the sponsor’s stated reason — the ClinicalTrials.gov whyStopped note — on all 214 terminated or withdrawn industry IBD trials. Business and portfolio decisions are the single largest cause (36%); inability to enroll is next (22%). Lack of efficacy (20%) and safety (4%) together are only ~23% — so when an IBD trial is pulled early, ~77% of the time the reason says nothing about whether the drug worked.
Alnylam's two siRNA drugs hit the same liver target. One failed an FDA review in 2023. Two years later the other was approved for both forms of ATTR amyloidosis. The mechanism didn't change. The trial design did.
In September 2023 an FDA advisory committee voted 9-3 that patisiran's benefit supported approval for cardiac ATTR amyloidosis. The FDA rejected it anyway. Eighteen months later it approved vutrisiran — a near-identical Alnylam siRNA against the same liver target — for both forms of ATTR at once. Patisiran's APOLLO-B was 360 patients, 12 months, a six-minute-walk endpoint (+14.7 m, p=0.0162) with a secondary composite that missed at a win ratio of 1.27. Vutrisiran's HELIOS-B was 655 patients, up to 36 months, a hard mortality-plus-CV-events composite cut by 28%. Same mechanism, opposite verdicts — the molecule never changed, the trial did.
Eleven years after approval, Entyvio remains the only IBD drug that acts only in the gut — and two large pharma programs have failed trying to replicate it.
Tysabri (natalizumab) blocks α4 integrin broadly — and 541 patients developed fatal brain infections. Entyvio (vedolizumab) blocks only α4β7, which binds MAdCAM-1 on gut endothelium. One Greek letter difference. Over a million patient-years, no REMS, no MRI surveillance. Takeda's $6 billion franchise is built on that subtraction — and on a head-to-head trial where vedolizumab beat Humira directly in ulcerative colitis.
One arm grabs the cancer cell. The other grabs a T-cell. The bispecific forces them together.
CAR-T cell therapy works but takes weeks to manufacture and costs $400K+ per patient. T-cell engager bispecific antibodies do the same job as an injectable drug - no cell extraction, no manufacturing delay. Ten are now FDA-approved across myeloma, lymphoma, leukemia, and solid tumors, competing directly with CAR-T in the same diseases.
Pfizer, Amgen, Lilly, Merck, and Astellas all failed at IGF-1R in cancer. Then a shelved Roche antibody became the only effective treatment for thyroid eye disease. Same receptor, completely different biology.
Five major pharmas spent two decades chasing IGF-1R as a cancer target. Every Phase 3 trial failed. The only IGF-1R drug ever approved is for thyroid eye disease — Tepezza, which generated $1.9 billion in 2024 and 8x exceeded its acquirer's peak forecast. Eleven more IGF-1R-for-TED programs are now in clinical trials, including the literal cancer-graveyard compound being resurrected by Sling Therapeutics. Targets don't travel. Disease context decides.
Nobody knew why it caused birth defects for 50 years. The answer launched a new era of drug design.
The worst drug disaster in pharmaceutical history accidentally revealed how to hijack the cell's protein disposal system. Celgene turned thalidomide derivatives into a $12.8B franchise without knowing the mechanism. When scientists finally identified the target in 2010, it launched targeted protein degradation - now one of the most promising modalities in drug development, with its first FDA-approved drug.
Two drugs finally broke through. They work only before most patients are ever diagnosed.
Alzheimer's drug development has a 99.6% failure rate - the highest of any disease. Between 2003 and 2021, zero new treatments were approved while $42.5 billion was spent on clinical trials. Then lecanemab and donanemab broke through. But 27% slowing of cognitive decline, brain swelling in up to 1 in 4 patients, and $26,000/year raises the question: is this enough?
A decade of data. From Spinraza to Mounjaro, what the designations tell you.
We analyzed every novel drug the FDA approved from 2016 to 2025 - 459 drugs across 10 years - and tagged each one with its regulatory designations. Half target rare diseases. 42% are first-in-class. Breakthrough therapy doubled. From Spinraza to Mounjaro, the patterns tell you more about how the FDA works than any single approval ever could.
Every approved IBD drug fights inflammation. None of them touch fibrosis. TL1A does both.
30% of Crohn's disease patients will need surgery within ten years of diagnosis - not because their drugs failed to control inflammation, but because no approved drug stops the scar tissue that narrows their bowel. TL1A is the first target that could change that. Here is the biology behind the $18 billion bet.
How a quiet antibody program in the Netherlands became the highest-revenue drug in pharmaceutical history.
Keytruda was invented at Organon in the Netherlands, buried in two acquisitions, and became a $32B/year franchise across 20 cancer types. Nearly half of Merck's total revenue now depends on one molecule. Its US patent expires December 2028.
It took 40 years to drug KRAS. The real competition started the day it worked.
KRAS mutations drive roughly 30% of all cancers. For four decades, no one could drug it. In 2021, sotorasib cracked the target. Now three approaches - next-gen G12C, G12D inhibitors, and pan-KRAS degraders - are racing to turn a proven mechanism into a blockbuster.
A biosimilar approved in 2016. Still shelved in 2026.
Sandoz's Erelzi received FDA approval in August 2016. Nearly a decade later, it still hasn't launched in the US - while the same drug has been selling in Europe since 2017. The patent cliff is set for 2029. An antitrust challenge was dismissed in February 2026 and is now on appeal.
Amgen got FDA approval for Amjevita in September 2016. It shipped its first US vial in January 2023. Six and a half years between approval and market entry - and nine more Humira biosimilars followed the same pattern. The gap between "approved" and "on sale" isn't a quirk of Humira. It's how biologics competition works.
$6 billion in revenue. Generics launch May 2026. The decline already started.
Januvia was a $6 billion franchise for a decade. Generics launch in May 2026, but revenue is already down 64% from peak - squeezed by GLP-1 competition from above and generic anticipation from below.
How a genetic discovery in 2003 launched a $5 billion market.
In 2006, researchers found people born with broken copies of PCSK9 had very low cholesterol and almost no heart attacks. They were healthy. That was the signal. Four drugs across three different modalities now target the same gene - a combined market exceeding $5 billion in 2025.
Sickle cell disease is a single-letter typo in DNA. CRISPR can now edit DNA with precision. You'd think the fix is obvious. It's not. Casgevy uses CRISPR to reactivate fetal hemoglobin instead of correcting the mutation directly — because the indirect approach is proving safer and more effective.
The difference explains everything about how biologics compete.
When a small-molecule patent expires, generics arrive at 90% off. When a biologic patent expires, biosimilars arrive years later at a modest discount. Same industry, completely different economics. The reason is molecular.
How to read a drug name you have never seen before.
Pembrolizumab. Adalimumab. Semaglutide. These look like random syllables. They're not. Every generic drug name follows a WHO naming code that encodes the drug class, mechanism, and modality directly into its name. Once you know the suffixes, you can decode any drug on sight.
Pro gives you the data — patent cliffs, trial analytics, competitive landscapes, revenue tracking. Briefs tell the story with the data. Launch pricing: $99/month.
