a.pereira

TL2 Moderator · Brno

Contributes reviews on supplier material. Based in Brno.

Joined 29 July 2025 · last posted 4d

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Asking a follow-up: new topic or new reply? Replied, post #69 · Start Here › How to Ask · 24 Jul 2026 · 0 likes This follows post #66 rather than contradicting it. Five questions in one post gets you one answer: the easiest one, usually not the one you needed most. Post them…
Batch numbers that do not match the vial label Replied, post #45 · Sourcing › Red flags · 18 Jul 2026 · 19 likes Inconsistency across documents: a certificate stating one purity, a website claiming another, and a supplier's verbal representation claiming a third, all on the same…
Follow-up: How compounding permissions changed when supply normalised Replied, post #34 · Sourcing › Regulatory · 17 Jul 2026 · 5 likes Preclinical versus clinical: compounds with strong preclinical data can fail in clinical trials. Compounds with no human data are being used on theoretical grounds. The…
Journal club: indirect comparison between two programmes, defended and attacked Replied, post #118 · Evidence › Journal club · 15 Jul 2026 · 19 likes PIONEER 6 (N Engl J Med 2019): Cardiovascular safety trial for oral semaglutide, not efficacy. Non-inferiority for safety was met. The trial was not designed to…
Coming back to: Specificity, linearity, accuracy, precision, range, robustness — with… Replied, post #83 · Analytics › Method validation · 9 Jul 2026 · 11 likes System suitability: injections run at the start of a batch to establish that the instrument and column are performing. Acceptance criteria typically include replicate…
A single out-of-range value on an otherwise normal panel Replied, post #62 · Clinical › Bloodwork · 21 Jun 2026 · 2 likes Lipid panel interpretation: total, LDL, HDL, triglycerides all on one panel. Reading them together is more informative than reading one value in isolation. An elevated…
Alcohol: what is documented and what is folklore Replied, post #67 · Practice › Interactions · 20 Jun 2026 · 0 likes I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The distinction being drawn does not survive when you look at…
The anatomy of a question that gets answered within an hour Replied, post #82 · Start Here › How to Ask · 18 Jun 2026 · 11 likes Disagreement-style questions: "I read this and it contradicts what I heard here, which is right?" is answerable. "Is this a bad idea?" without giving the context is not.
Rewriting my first post: a before-and-after, with commentary — what changed since Replied, post #6 · Start Here › How to Ask · 9 Jun 2026 · 0 likes Arithmetic questions: write out the steps. "I have a 10 mg vial, I added 2 mL, I want a 0.25 mg dose, and I get this number for the syringe mark" is answerable. "How…
Second pass at: Metformin co-administration and additive GI effects Replied, post #115 · Practice › Interactions · 30 May 2026 · 31 likes Separation timing versus clinically important interaction: a separation timing inconvenience (taking one medication 2 hours before or after another) is not the same as…
Injection volume, overload, and peak distortion Replied, post #13 · Analytics › HPLC & UHPLC · 20 May 2026 · 16 likes Worth separating two things that post #9 runs together. Before anything else: what was the gradient, and at what wavelength? Area percent at different wavelengths is…
Follow-up: Search filters: what is missing Replied, post #105 · Meta › Site feedback · 18 May 2026 · 0 likes I read post #103 twice before replying, because I had assumed the opposite. Guideline clarity: if the guidelines are unclear or seem to be applied inconsistently, post…