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Safety · Contraindications

Personal or family history of medullary thyroid carcinoma — what changed since

AT
a.thorneTL2Wiki editor29 Mar 2026#1

Posting this under the heading it deserves: Personal or family history of medullary thyroid carcinoma — what changed since Everything below is what sits behind that.

Asking about a population rather than about a person.

The published trials in this class mostly enrolled a fairly specific group, and the questions here frequently come from people well outside it. I would like to understand what the honest position is when someone falls outside the studied population: not "it is fine" and not "there is no data", but what the reasoning actually looks like.

0 likes 4mo
EF
e.ferreiraTL3Regular1 Apr 2026#2

Worth separating two things that the opening post runs together.

Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing.

The correction was fair and I had been repeating something I had not checked carefully enough.

2 likes 4mo
HF
h.falkTL2 Moderator3 Apr 2026#3

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.

15 likes 4mo
TD
titration_diaryTL3Regular5 Apr 2026#4

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.

29 likes 4mo
SO
s.okaforTL2 Moderator6 Apr 2026#5

post #4 answers the question as asked. The question underneath it is different.

Diabetic retinopathy complications: a signal for this was noted in SUSTAIN 6. Current evidence is mixed. The risk is not zero and some caution is appropriate in people with baseline retinopathy.

0 likes 4mo
LG
lc_gradientTL3Analytical chemist8 Apr 2026 · edited#6

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.

5 likes 4mo
DV
d.vukovicTL2 Moderator9 Apr 2026#7
s.okafor, post #5: post #4 answers the question as asked. The question underneath it is different. Diabetic retinopathy complications: a signal for this was noted in SUSTAIN 6. Current evidence is mixed. The risk is not zero and some caution is appropriate in people with baseline retinopathy. Go to post

For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.

21 likes in reply to #5 4mo
DB
dr_bhattacharyaTL3Physician11 Apr 2026#8

Disordered eating history: appetite suppression can trigger relapse in people with history of anorexia, bulimia, or other eating disorders. This is a relative contraindication requiring specialist input.

0 likes 4mo
JR
j.restrepoTL2 Moderator12 Apr 2026#9

Severe hepatic impairment: less is known than for kidney disease. Extreme caution or contraindication depending on the specific degree of impairment.

30 likes 4mo
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KAnderssonTL3Regular14 Apr 2026#10

Pregnancy: these compounds are not approved for pregnancy. The potential risks outweigh potential benefits. Planning windows and washout (several months) are the standard approach.

0 likes 3mo
JT
j.teixeiraTL2 Moderator15 Apr 2026#11

Gastroparesis or severe delayed gastric emptying: these compounds slow gastric emptying. Pre-existing severe gastroparesis can be worsened. That is a relative contraindication depending on baseline severity.

7 likes 3mo
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GDashwoodTL3Regular16 Apr 2026#12

This follows post #9 rather than contradicting it.

Concurrent insulin or sulfonylureas: not an absolute contraindication but requires dose adjustment and close monitoring for hypoglycemia. The combination is used with caution, not avoided.

1 like 3mo
CH
ca.haddadTL217 Apr 2026#13
VK
v.klausenTL3Regular19 Apr 2026#14
d.vukovic, post #7: For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use. Go to post

Gastroparesis or severe delayed gastric emptying: these compounds slow gastric emptying. Pre-existing severe gastroparesis can be worsened. That is a relative contraindication depending on baseline severity.

24 likes in reply to #7 3mo
EC
e.coelhoTL2 Moderator20 Apr 2026#15

Coming back to post #13, because the follow-up matters more than the original answer.

Disordered eating history: appetite suppression can trigger relapse in people with history of anorexia, bulimia, or other eating disorders. This is a relative contraindication requiring specialist input.

11 likes 3mo
ID
integrator_draftTL3Regular21 Apr 2026 · edited#16

Picking up post #13: that is the part I would want checked first.

Pregnancy: these compounds are not approved for pregnancy. The potential risks outweigh potential benefits. Planning windows and washout (several months) are the standard approach.

3 likes 3mo
NS
n.szaboTL2 Moderator22 Apr 2026#17
ca.haddad, post #13: Concurrent insulin or sulfonylureas: not an absolute contraindication but requires dose adjustment and close monitoring for hypoglycemia. The combination is used with caution, not avoided. Go to post

Two things before anyone answers the substance.

First, the context in the first post is clear and specific. Second, the question is framed so that an answer can actually address it. Both are the norm here and both matter more than they sound.

0 likes in reply to #13 3mo
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OkaforTL3Regular23 Apr 2026#18

Severe renal impairment (eGFR <15): these compounds are renally cleared and accumulate in severe kidney disease. Risk-benefit is unfavourable without dose adjustment.

33 likes 3mo
FI
f.ibarraTL2 Moderator24 Apr 2026#19

I read post #17 twice before replying, because I had assumed the opposite.

Severe hepatic impairment: less is known than for kidney disease. Extreme caution or contraindication depending on the specific degree of impairment.

1 like 3mo
SC
septum_checkTL1Member26 Apr 2026#20

Diabetic retinopathy complications: a signal for this was noted in SUSTAIN 6. Current evidence is mixed. The risk is not zero and some caution is appropriate in people with baseline retinopathy.

0 likes 3mo
DA
d.achebeTL2 Moderator27 Apr 2026#21

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.

18 likes 3mo
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DKwiatkowskiTL3Regular28 Apr 2026#22

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.

0 likes 3mo
FP
f.piresTL2 Moderator29 Apr 2026#23

post #22 is right about the mechanism and I think understates the practical bit.

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.

1 like 3mo
GD
glossary_deskTL3Regular30 Apr 2026 · edited#24
integrator_draft, post #16: Picking up post #13: that is the part I would want checked first. Pregnancy: these compounds are not approved for pregnancy. The potential risks outweigh potential benefits. Planning windows and washout (several months) are the standard approach. Go to post

Worth separating two things that post #20 runs together.

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.

7 likes in reply to #16 3mo
AV
a.villalobosTL2 Moderator1 May 2026#25

Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the kind that comes from remembering a figure instead of looking it up.

24 likes 3mo
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DSakamotoTL3Regular2 May 2026#26

Coming back to post #24, because the follow-up matters more than the original answer.

Severe hepatic impairment: less is known than for kidney disease. Extreme caution or contraindication depending on the specific degree of impairment.

0 likes 3mo
JL
j.lokkenTL2 Moderator3 May 2026#27

post #26 answers the question as asked. The question underneath it is different.

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.

3 likes 3mo
TF
taper_fileTL34 May 2026#28
TB
t.brandtTL2 Moderator5 May 2026#29
f.ibarra, post #19: I read post #17 twice before replying, because I had assumed the opposite. Severe hepatic impairment: less is known than for kidney disease. Extreme caution or contraindication depending on the specific degree of impairment. Go to post

This follows post #26 rather than contradicting it.

Diabetic retinopathy complications: a signal for this was noted in SUSTAIN 6. Current evidence is mixed. The risk is not zero and some caution is appropriate in people with baseline retinopathy.

33 likes in reply to #19 3mo
DM
d.magalhesTL2Member6 May 2026#30

Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own records is not any individual result; it is that they are dated and consecutive.

0 likes 3mo