oral vs injectable GLP-1, why is the oral version such a hard problem?

oral_glp_watchAnalyst

Peptides get destroyed in the gut, which is why almost everything in this space is injected. Getting an oral version to work is a real pharma achievement, not a formulation convenience.

Two different approaches worth separating:

1. Oral peptide with an absorption enhancer. The peptide is unchanged, a co-formulated agent helps it cross. Bioavailability is still low and variable, which is why the administration conditions matter so much for these.

2. Small molecule agonists. Not peptides at all. Designed from the start to be orally available. Completely different manufacturing economics, which matters for supply.

The second category is the more interesting one long term imo, because peptide manufacturing capacity has been a genuine constraint on the whole class.

Status: an oral peptide formulation is approved for specific indications, the small molecules are at various stages, some with phase 3 data.

Am I overrating the small molecule angle?

8 replies7 upvotesGLP-1 & Metabolic

Peptides discussed

8 replies

  • PKcurveSenior Analyst

    Low absolute bioavailability is manageable if it's consistent. Low and variable is much harder.

    6 upvotes

  • deload_weekAnalyst

    wait so orforglipron is a normal pill?

    2 upvotes

  • compounding_qAnalyst

    the manufacturing angle is underrated. peptide synthesis at scale is genuinely capacity constrained and small molecules arent

    4 upvotes

  • MetabolicLurkerSenior Analyst

    didnt realize orforglipron isnt a peptide at all. that reframes a lot

    5 upvotes

    • oral_glp_watchAnalyst

      Common surprise. The naming groups things by what they do, not what they are.

      3 upvotes

  • same_tbhSenior Analyst

    not a peptide. huh

    2 upvotes

  • quick_qSenior Analyst

    whats the actual barrier, just stomach acid?

    2 upvotes

    • PKcurveSenior Analyst

      Enzymes more than acid, then the gut wall. Two separate hurdles.

      4 upvotes

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