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Safety · Contraindications

Personal or family history of medullary thyroid carcinoma

PW
PharmNotes_WhitfieldTL4Pharmacist20 Jun 2026#1

Personal or family history of medullary thyroid carcinoma Writing it up because I had to work it out twice and would rather nobody else did.

Asking about a contraindication as written rather than as remembered.

I have the labelling in front of me and the wording is narrower than the way it gets quoted here. A trial exclusion criterion and a contraindication are different documents with different purposes, and I think the two are being conflated.

Am I reading it correctly?

33 likes 1mo
JV
j.vandermolenTL3Regular20 Jun 2026#2

Medullary thyroid carcinoma (personal or family history) or multiple endocrine neoplasia type 2: absolute contraindication. The rodent preclinical signal is real enough to exclude this population.

7 likes 1mo
CS
c.serranoTL221 Jun 2026#3

Somebody's condition being on a list does not settle the decision, and somebody's condition being absent from one does not either.

Old habit: I write down the expected answer before I calculate it.

0 likes 1mo
TN
t.nardoneTL3Regular21 Jun 2026 · edited#4
c.serrano, post #3: Somebody's condition being on a list does not settle the decision, and somebody's condition being absent from one does not either. Old habit: I write down the expected answer before I calculate it. Go to post

Adding the measurement that the opening post says would settle it.

Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution.

I have said this before in a thread nobody could find, so it is worth repeating.

0 likes in reply to #3 1mo
SD
st.dialloTL222 Jun 2026#5
j.vandermolen, post #2: Medullary thyroid carcinoma (personal or family history) or multiple endocrine neoplasia type 2: absolute contraindication. The rodent preclinical signal is real enough to exclude this population. Go to post

Personal or family history of medullary thyroid carcinoma, or multiple endocrine neoplasia type 2, is the clearest contraindication in this class and it is specific rather than general.

25 likes in reply to #2 1mo
H
HHidalgoTL2Member22 Jun 2026#6

Somebody's condition being on a list does not settle the decision, and somebody's condition being absent from one does not either.

12 likes 1mo
BC
b.correiaTL222 Jun 2026#7

On post #5 — agreed on the reasoning, with one qualification.

Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution.

I have no interest in any supplier named above.

1 like 1mo
GV
g.valckenaereTL3Regular23 Jun 2026#8

Adding a data point of agreement rather than a data point.

0 likes 1mo
EN
e.ndiayeTL223 Jun 2026 · edited#9

Somebody's condition being on a list does not settle the decision, and somebody's condition being absent from one does not either.

33 likes 1mo
DS
d.szymanskiTL3Wiki editor24 Jun 2026#10

Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution.

Two sources, same conclusion, and I could not rule out that one copied the other.

17 likes 1mo
SG
s.grigorescuTL2Member24 Jun 2026#11

Picking up post #10: that is the part I would want checked first.

A history of pancreatitis appears in the cautions and the decision around it needs somebody who knows the history rather than a general rule.

That is all the detail I have. Someone else will have more.

3 likes 1mo
WV
w.verhoevenTL224 Jun 2026#12

Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution.

Someone will know this better than I do and I hope they say so.

11 likes 1mo
N
NicolaidesTL3Regular25 Jun 2026 · edited#13
t.nardone, post #4: Adding the measurement that the opening post says would settle it. Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution. I have said this before in a thread nobody could find, so it is worth repeating. Go to post

Somebody's condition being on a list does not settle the decision, and somebody's condition being absent from one does not either.

32 likes in reply to #4 1mo
GT
g.tammTL225 Jun 2026#14
g.valckenaere, post #8: Adding a data point of agreement rather than a data point. Go to post

I had written a reply contradicting post #12 and deleted it. Here is what survived.

Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution.

0 likes in reply to #8 1mo
SL
sleep_logTL2Regular25 Jun 2026#15

Adding the measurement that post #14 says would settle it.

Somebody's condition being on a list does not settle the decision, and somebody's condition being absent from one does not either.

6 likes 1mo
II
i.ilungaTL226 Jun 2026#16
IA
i.aranda_esTL2Translator · ES26 Jun 2026#17
t.nardone, post #4: Adding the measurement that the opening post says would settle it. Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution. I have said this before in a thread nobody could find, so it is worth repeating. Go to post

Somebody's condition being on a list does not settle the decision, and somebody's condition being absent from one does not either.

I would want a second opinion before relying on that.

0 likes in reply to #4 1mo
RW
r.weissTL226 Jun 2026#18

Helpful, and easy to find again, which is half of what a good reply is.

1 like 1mo
TF
taper_fileTL3Regular26 Jun 2026#19

Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution.

0 likes 1mo
CK
c.kuuselaTL227 Jun 2026#20
r.weiss, post #18: Helpful, and easy to find again, which is half of what a good reply is. Go to post

Post #17 and I disagree about the size of the effect, not about the direction.

Somebody's condition being on a list does not settle the decision, and somebody's condition being absent from one does not either.

4 likes in reply to #18 1mo
JV
j.vandermolenTL3Regular27 Jun 2026 · edited#21

History of pancreatitis: these compounds can rarely trigger pancreatitis. History of pancreatitis increases relative risk. That is a relative contraindication, not absolute, but requires monitoring.

13 likes 1mo
AL
a.lindqvistTL227 Jun 2026#22

Somebody's condition being on a list does not settle the decision, and somebody's condition being absent from one does not either.

The interesting part of this is the exception, and I do not understand the exception.

4 likes 1mo
L
LeitermanTL3Regular28 Jun 2026#23
g.tamm, post #14: I had written a reply contradicting post #12 and deleted it. Here is what survived. Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution. Go to post

Everything in post #21 holds. The case it does not cover is the one I have.

Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution.

Worth one more sentence than it usually gets.

0 likes in reply to #14 30d
NS
n.serranoTL228 Jun 2026#24

Narrowing post #21, because the general version has more than one answer.

Somebody's condition being on a list does not settle the decision, and somebody's condition being absent from one does not either.

Small point, but it is the one that usually catches people.

0 likes 30d
DN
desiccant_notesTL2Member28 Jun 2026#25

Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution.

The evidence for this is thinner than the way I have phrased it suggests.

19 likes 30d
MR
m.ramosTL228 Jun 2026#26

Adding thanks rather than a view. I do not have a view worth the space.

8 likes 29d
GV
g.valckenaereTL3Regular29 Jun 2026#27
taper_file, post #19: Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution. Go to post

Answering the question post #25 raises rather than the one it answers.

Somebody's condition being on a list does not settle the decision, and somebody's condition being absent from one does not either.

If that reads as pedantic, it is, and it has saved me twice.

2 likes in reply to #19 29d
SR
s.roosTL229 Jun 2026#28
g.tamm, post #14: I had written a reply contradicting post #12 and deleted it. Here is what survived. Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution. Go to post

Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution.

0 likes in reply to #14 29d
RH
revision_historyTL329 Jun 2026#29
EM
e.mbekiTL230 Jun 2026 · edited#30
st.diallo, post #5: Personal or family history of medullary thyroid carcinoma, or multiple endocrine neoplasia type 2, is the clearest contraindication in this class and it is specific rather than general. Go to post

Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants caution.

I have changed my mind on this once already, so take it as current rather than settled.

12 likes in reply to #5 28d