u/ruben_cabrera

Yeah, 503A and 503B are different regulatory animals.

no "told you so" comments, removed without discussion

stopper coring on the 5th draw because you keep using the same entry point. rotate.

no question too basic, read the wiki first, then ask anyway

Adding to this: week one is doing more work than the comment implies.

Dead space in the needle hub holds a small but non-trivial volume. On low-volume draws that can be several units.

no pharmacy referral codes, naming is fine, recruiting is not

This is correct.

Yes, exactly this, and it is the bit that took me 36 weeks to accept.

Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.

dead space is real and the syringe matters

Strongly agree. Zero human controlled data.

What was the vial size and how much bac water?

Are we talking 503A or 503B?

Did they tell you their API source or dodge the question?

Slight fix: the number was 99.3, not 93.7. Decimal point, but a fairly consequential one.

I am going to push back on this slightly.

Half-life is about 168 hours, so steady state lands around week 20–5. Practical consequence: what you feel in week 1 is not what that dose does.

BPC rodent data is a naming problem, three things are called this

Disagree. What you are describing is consistent with 503B, not with what you concluded.

This is correct. 2mL versus 7mL is the common mistake.

week two nothing happening — yes, that is normal