MENBENDAZOLE
MENBENDAZOLE
Purity: 99 percent HPLC Verified
Storage Conditions: Store at -20C
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Mebendazole is a real human medicine,
What it is approved for in humans:
It's a benzimidazole dewormer, used for decades for intestinal worms like pinworm, roundworm, whipworm and hookworm. In that use it's generally well tolerated, with the usual short-course side effects being stomach upset, headache and diarrhoea.
In lab dishes and mice, mebendazole does interesting things:
Blocks microtubules, so cancer cells can't divide properlyReduces new blood vessel growth that tumours needAffects pathways like Hedgehog and Wnt signalling
It can cross the blood-brain barrier, which made brain tumours like glioblastoma a particular focus clyr.health That lab activity is real, but lab activity is not proof it works in people.
What human trials actually show so far:Still very early and small. Most are Phase 1 trials designed to test safety, not to prove it shrinks tumoursA Phase 1 trial in children / young adults with refractory brain tumours found it was generally well tolerated, but with only limited evidence of effectiveness on its own.
One small 40-person trial in metastatic colorectal cancer added mebendazole to chemo + bevacizumab and reported better response, but it's one small trial with registration issues, not a demonstration that it treats cancer alone.
A larger 197-person combination series on ivermectin + mebendazole was retracted after problems with how the outcomes were measuredNo large Phase 3 trial has shown it improves survival or shrinks tumours at scale.
A big practical problem: mebendazole is poorly and variably absorbed. Many patients never reach the blood levels researchers think would be needed for an anti-cancer effect, even at doses far above worm-treatment doses clyr.health
What oncology bodies say:
In May 2026, ASCO cautioned against using ivermectin or fenbendazole for cancer outside a proper trial, saying cell and animal effects have not been shown to translate to people. Mebendazole is not in guidelines as a cancer treatment. medindia.netRisks of self-treating:
High-dose, off-label use without monitoring can cause liver enzyme rises, bone marrow suppression, and GI toxicity, plus interactions with chemo and other drugs. It also risks delaying proven treatment, and veterinary products may not have the same quality control as human medicines.
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