PeptideStack
5.2kquestions
20kanswers
220users

thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the interaction with existing levothyroxine dosing.

14 questions · sorted by votes

34 votes3 answers17k views
What are the rodent C-cell findings behind the thyroid warning, and do they transfer to humans?

The US labelling for several drugs in this class carries a boxed warning about thyroid C-cell tumours, and it is stated fairly starkly — tumours in both rats and…

thyroid
thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the…

14 questions
clinical-trials
clinical-trials

Reading the primary literature properly: estimands, intention-to-treat versus per-protocol, confidence intervals, absolute versus relative…

913 questions
liraglutide
liraglutide

A once-daily GLP-1 receptor agonist and the compound that established the class. Still relevant for its shorter half-life, its paediatric and…

14 questions
semaglutide
semaglutide

A GLP-1 receptor agonist with a fatty-acid-acylated backbone and a roughly one-week half-life, marketed for type 2 diabetes and for weight…

360 questions
asked by swab_and_wait 15k · 2.1 years ago
34 votes 3 answers7.4k views
My TSH keeps drifting and I take levothyroxine — is it the weight loss or the gastric emptying?

Hypothyroid on 125 µg levothyroxine for six years, stable TSH around 1.4 mIU/L that whole time. Since starting tirzepatide nine months ago and losing 21 kg, my TSH…

thyroid
thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the…

14 questions
hormones
hormones

Endocrine changes accompanying substantial weight loss: sex hormone binding globulin, testosterone, oestradiol, cortisol and the reproductive…

14 questions
bloodwork
bloodwork

Laboratory monitoring: which panels are worth ordering, sensible intervals, reference-range versus optimal-range arguments, and how to read a…

284 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
asked by bea_forsberg 14k · 2 months ago
30 votes 5 answers27k views
Does LDL-C tell me anything about hepatic fat on cagrilintide?

What I am working with: LDL-C · cagrilintide. I keep seeing this stated as a fact with no explanation attached, and unexplained facts make me suspicious. My…

liver-enzymes
liver-enzymes

ALT, AST, GGT and ALP: what they do and do not indicate about hepatic fat, why enzymes are a poor surrogate for histology, and where non-invasive…

50 questions
mash
mash

Metabolic dysfunction-associated steatohepatitis: histological endpoints, resolution without worsening fibrosis, fibrosis improvement by stage,…

51 questions
bloodwork
bloodwork

Laboratory monitoring: which panels are worth ordering, sensible intervals, reference-range versus optimal-range arguments, and how to read a…

284 questions
thyroid
thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the…

14 questions
asked by esben_lykke 15k · 10 months ago
29 votes5 answers25k views
Is ESSENCE a fair comparison of cagrilintide against its comparator arm?

What I am working with: ESSENCE · cagrilintide. This is asserted often enough that I assumed it was established, and then I went looking for the source. I have…

clinical-trials
clinical-trials

Reading the primary literature properly: estimands, intention-to-treat versus per-protocol, confidence intervals, absolute versus relative…

913 questions
semaglutide
semaglutide

A GLP-1 receptor agonist with a fatty-acid-acylated backbone and a roughly one-week half-life, marketed for type 2 diabetes and for weight…

360 questions
tirzepatide
tirzepatide

A dual GIP and GLP-1 receptor agonist. Questions here cover the SURPASS and SURMOUNT programmes, the practical differences from a pure GLP-1…

162 questions
thyroid
thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the…

14 questions
asked by oona_kekkonen 16k · 16 months ago
29 votes0 answers13k views
Should I screen calcitonin before starting?

My laboratory results are from the same laboratory each time, drawn fasting, which I gather matters. I am trying to build something sustainable rather than something…

thyroid
thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the…

14 questions
bloodwork
bloodwork

Laboratory monitoring: which panels are worth ordering, sensible intervals, reference-range versus optimal-range arguments, and how to read a…

284 questions
clinical-trials
clinical-trials

Reading the primary literature properly: estimands, intention-to-treat versus per-protocol, confidence intervals, absolute versus relative…

913 questions
asked by retest_please 13k · 22 months ago
27 votes 3 answers8.8k views
Should I get a baseline serum calcitonin before starting? Working the predictive value

A private clinic offered me a "pre-treatment endocrine screen" including serum calcitonin, with the reasoning that the boxed warning concerns C cells and calcitonin…

thyroid
thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the…

14 questions
bloodwork
bloodwork

Laboratory monitoring: which panels are worth ordering, sensible intervals, reference-range versus optimal-range arguments, and how to read a…

284 questions
harm-reduction
harm-reduction

Reducing avoidable risk where a decision has already been made: independent verification before use, sterility practice, dose arithmetic checked…

445 questions
cost-analysis
cost-analysis

Cost arithmetic done honestly: cost per milligram after dead-space loss, list versus net price, comparing a multi-dose vial to a fixed-dose pen,…

261 questions
asked by coldpack_88 37k · 13 months ago
24 votes0 answers22k views
What did the placebo arm of SURMOUNT-1 report for nausea?

What I have: SURMOUNT-1 · nausea. This is presented as though it settles something, and I am not convinced it does. I have two documents that appear to disagree,…

clinical-trials
clinical-trials

Reading the primary literature properly: estimands, intention-to-treat versus per-protocol, confidence intervals, absolute versus relative…

913 questions
gi-side-effects
gi-side-effects

The gastrointestinal cluster as a whole - nausea, vomiting, diarrhoea, constipation, reflux, early satiety - with trial incidence rates, dropout…

416 questions
nausea
nausea

The dominant tolerability signal in every trial of the class: incidence, timing relative to a dose step, duration, and the distinction between…

346 questions
thyroid
thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the…

14 questions
asked by lane_transit 42k · 2.1 years ago
19 votes0 answers11k views
What does FLOW report at the 20 mg dose level?

The particulars: FLOW · 20 mg. I want to understand what this actually establishes, as opposed to what it is being used to imply. My concern is that I am being…

clinical-trials
clinical-trials

Reading the primary literature properly: estimands, intention-to-treat versus per-protocol, confidence intervals, absolute versus relative…

913 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
titration
titration

Stepwise dose increases over weeks, why the label schedules exist at all, and what tolerability-driven deviation from a schedule looks like in…

444 questions
thyroid
thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the…

14 questions
asked by fiadh_cronin 14k · 9 months ago
17 votes0 answers18k views
Is a titration interval of four weeks better supported than four weeks for dulaglutide?

What I have: four weeks · dulaglutide. I am asking for verification rather than opinion, ideally with something I can read myself. It is possible the evidence exists…

titration
titration

Stepwise dose increases over weeks, why the label schedules exist at all, and what tolerability-driven deviation from a schedule looks like in…

444 questions
dose-escalation
dose-escalation

The decision to move up a step: what evidence supports a four-week interval, what happens when you compress it, and how trial protocols handled…

88 questions
clinical-trials
clinical-trials

Reading the primary literature properly: estimands, intention-to-treat versus per-protocol, confidence intervals, absolute versus relative…

913 questions
thyroid
thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the…

14 questions
asked by juliette_farnese 12k · 2.4 years ago
13 votes3 answers12k views
Why did my triglycerides move after ten weeks on cagrilintide?

The specifics, since they change the answer: triglycerides · ten weeks · cagrilintide. Something has gone wrong and I would like to know how badly before I decide…

bloodwork
bloodwork

Laboratory monitoring: which panels are worth ordering, sensible intervals, reference-range versus optimal-range arguments, and how to read a…

284 questions
kidney-function
kidney-function

eGFR, creatinine, cystatin C and albuminuria: the acute haemodynamic dip that is not injury, the renal outcome data from the FLOW programme, and…

100 questions
lipids
lipids

Lipid response on treatment: triglycerides, LDL-C, non-HDL-C, ApoB and Lp(a), which of them move with weight loss, and why a fasting panel drawn…

112 questions
thyroid
thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the…

14 questions
asked by vialroom 87k · 7 months ago
11 votes 5 answers27k views
What did the placebo arm of REDEFINE-1 report for fatigue?

Conditions: REDEFINE-1 · fatigue. I would like to know the limits of what can be inferred from this. What I am trying to avoid is over-reading a single result, which…

clinical-trials
clinical-trials

Reading the primary literature properly: estimands, intention-to-treat versus per-protocol, confidence intervals, absolute versus relative…

913 questions
gi-side-effects
gi-side-effects

The gastrointestinal cluster as a whole - nausea, vomiting, diarrhoea, constipation, reflux, early satiety - with trial incidence rates, dropout…

416 questions
nausea
nausea

The dominant tolerability signal in every trial of the class: incidence, timing relative to a dose step, duration, and the distinction between…

346 questions
thyroid
thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the…

14 questions
asked by swirl_dont_shake 19k · 2.4 years ago
9 votes5 answers20k views
What non-invasive test is worth using to track hepatic fibrosis?

I have three data points across nine months, which I hope is enough to see a trend. The comparison I want does not seem to exist anywhere in a form I can evaluate. I…

mash
mash

Metabolic dysfunction-associated steatohepatitis: histological endpoints, resolution without worsening fibrosis, fibrosis improvement by stage,…

51 questions
liver-enzymes
liver-enzymes

ALT, AST, GGT and ALP: what they do and do not indicate about hepatic fat, why enzymes are a poor surrogate for histology, and where non-invasive…

50 questions
bloodwork
bloodwork

Laboratory monitoring: which panels are worth ordering, sensible intervals, reference-range versus optimal-range arguments, and how to read a…

284 questions
thyroid
thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the…

14 questions
asked by imani_dube 19k · 22 months ago
6 votes5 answers15k views
Is SURMOUNT-2 a fair comparison of ecnoglutide against its comparator arm?

The specifics, since they change the answer: SURMOUNT-2 · ecnoglutide. Somebody stated this to me confidently and I would like to check it before repeating it. I…

clinical-trials
clinical-trials

Reading the primary literature properly: estimands, intention-to-treat versus per-protocol, confidence intervals, absolute versus relative…

913 questions
semaglutide
semaglutide

A GLP-1 receptor agonist with a fatty-acid-acylated backbone and a roughly one-week half-life, marketed for type 2 diabetes and for weight…

360 questions
tirzepatide
tirzepatide

A dual GIP and GLP-1 receptor agonist. Questions here cover the SURPASS and SURMOUNT programmes, the practical differences from a pure GLP-1…

162 questions
thyroid
thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the…

14 questions
asked by m_haraldsen 38k · 2.1 years ago
5 votes 5 answers19k views
Does levothyroxine absorption change with delayed gastric emptying?

This is a question about interpretation, not about whether to act — I will take action questions elsewhere. The empirical answer seems settled. The explanation does…

thyroid
thyroid

Thyroid questions: the rodent C-cell findings behind the labelled warning, human calcitonin data, TSH drift during weight loss, and the…

14 questions
glp1-mechanism
glp1-mechanism

Receptor-level pharmacology: GLP-1R as a class B GPCR, cAMP and PKA signalling, biased agonism, internalisation and resensitisation, and the…

175 questions
bloodwork
bloodwork

Laboratory monitoring: which panels are worth ordering, sensible intervals, reference-range versus optimal-range arguments, and how to read a…

284 questions
asked by yuki_morishita 19k · 16 months ago
Sponsored

Sigma-Aldrich - Certified Reference Materials

Analytical standards and reagents with traceable certificates. Every quantitative result you read inherits the accuracy of the standard behind it.

Shop standards