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Clinical · Special populations · continued

Pregnancy and pregnancy planning: contraindication and washout posts 61–90

This is a continuation of a long topic, addressed by post number rather than by page. Start at post 1.

DN
desiccant_notesTL2Member4 Mar 2026#61

Pregnancy and pregnancy planning was covered in the wiki last year and the page has a review date on it, which is a better starting point than my memory of a thread.

0 likes 5mo
SR
s.roosTL25 Mar 2026#62

Dedicated trials in under-studied populations are the only real remedy and several are ongoing, which is worth saying rather than speculating.

The strength of my opinion here exceeds the strength of my evidence.

3 likes 5mo
CB
careful_beginnerTL1Member6 Mar 2026 · edited#63

Building on post #62 rather than restating it.

Extrapolating a point estimate to somebody well outside the enrolled range should be described as an extrapolation every time it is done.

15 likes 5mo
MR
m.ramosTL26 Mar 2026#64
buffer_review, post #47: The reason pregnancy and pregnancy planning is hard to answer is that the obvious measurement and the relevant quantity are not the same thing, and substituting one for the other is silent. Go to post

Post #60 put the caveat in the right place and I want to underline it.

On pregnancy and pregnancy planning, I would rather understate and be corrected upward than overstate and be quoted. That is a house style here and it is a good one.

30 likes in reply to #47 5mo
RH
revision_historyTL3Wiki editor7 Mar 2026#65

Understood, and I withdraw the assumption I opened with.

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MI
m.ilungaTL28 Mar 2026#66

I have been on both sides of the pregnancy and pregnancy planning argument in this category within eighteen months, which should tell you how strong the evidence for either side is.

1 like 5mo
GT
g.tanakaTL3Regular9 Mar 2026#67
z.iyer, post #27: The arithmetic in post #26 is right; the assumption feeding it is the part to check. Extrapolating a point estimate to somebody well outside the enrolled range should be described as an extrapolation every time it is done. Go to post

Medullary thyroid carcinoma history: an absolute contraindication because of the preclinical findings in rodent toxicology. The history (personal or family, especially multiple endocrine neoplasia type 2) is an important screening question.

That is all I can say without guessing.

10 likes in reply to #27 5mo
EM
e.mbekiTL210 Mar 2026#68
ambient_draft, post #43: A definition problem is doing most of the work in this pregnancy and pregnancy planning discussion. Once the term is pinned down I suspect the disagreement mostly goes away and what is left is small. Go to post

Where I part company with post #64, and it is a narrow parting.

The most useful contribution here is usually a citation to whichever published document comes closest, with a plain statement of how far it is from the question.

Nothing above should be read as advice about what anyone else should do.

22 likes in reply to #43 5mo
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BBramleyTL3Regular11 Mar 2026#69

Adding the measurement that post #66 says would settle it.

The thing about pregnancy and pregnancy planning that took me longest to accept is that a plausible mechanism is not evidence of an effect. It is a reason to look, not a result.

31 likes 5mo
TT
t.tullochTL212 Mar 2026#70

Post #68 describes the usual case. This is about the unusual one.

Posting my pregnancy and pregnancy planning numbers with the method attached so they can be discounted properly. Uncontrolled, unblinded, and collected by someone who wanted a particular answer.

0 likes 5mo
TS
taper_shiftTL3Regular13 Mar 2026#71
n.krastev, post #58: Pregnancy and breastfeeding are the clearest cases where the answer is that the trials excluded them and the labelling reflects that exclusion. Adding this to the thread rather than to the wiki, because I am not confident enough for the wiki. Go to post

Body weight at the extremes of the studied range affects exposure and the trials rarely reported enough to say by how much.

A weak preference rather than a position.

0 likes in reply to #58 5mo
JC
j.cabreraTL214 Mar 2026#72
ambient_draft, post #43: A definition problem is doing most of the work in this pregnancy and pregnancy planning discussion. Once the term is pinned down I suspect the disagreement mostly goes away and what is left is small. Go to post

Pregnancy and breastfeeding are the clearest cases where the answer is that the trials excluded them and the labelling reflects that exclusion.

Noting that I have skin in this question and have tried to discount for it.

21 likes in reply to #43 4mo
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OstrowskiTL2Member14 Mar 2026#73

Adding a null result on pregnancy and pregnancy planning. I looked, carefully, and found nothing, and null results deserve posting precisely because they never are.

5 likes 4mo
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h.nwosuTL215 Mar 2026#74

Taking post #71 at face value and following it one step further.

Pregnancy and pregnancy planning would be much easier to settle if anyone reported the denominator. Almost nobody reports the denominator.

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ThibodeauTL3Regular16 Mar 2026#75

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

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FC
f.chowdhuryTL217 Mar 2026#76
f.kimani, post #54: Since pregnancy and pregnancy planning keeps coming up, it should probably be a maintained page rather than a recurring thread. I am happy to draft it if someone with more direct experience will review it. Go to post

Nothing in this subcategory is medical advice and the questions asked here are precisely the ones that need an individual assessment.

28 likes in reply to #54 4mo
LO
l.oseiTL218 Mar 2026 · edited#77

Post #76 put the caveat in the right place and I want to underline it.

Being outside the studied population does not mean a treatment is unsafe. It means the usual evidence is not available and the reasoning has to be explicit.

9 likes 4mo
MR
m.restrepoTL219 Mar 2026#78

Building on post #76 rather than restating it.

A note on scope: what I am saying about pregnancy and pregnancy planning applies to the case in the first post and I would not extend it further without checking.

2 likes 4mo
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NLoughranTL3Regular20 Mar 2026#79

Post #76 describes the usual case. This is about the unusual one.

A request rather than an answer: could whoever has the primary source for pregnancy and pregnancy planning post it? I have seen the claim three times this month and each version had lost a qualifier.

22 likes 4mo
MA
m.amankwahTL220 Mar 2026#80
revision_history, post #65: Understood, and I withdraw the assumption I opened with. Go to post

Adding the measurement that post #79 says would settle it.

Post-surgical populations, particularly after procedures affecting the gastrointestinal tract, interact with a delayed-emptying mechanism in ways that need specialist input.

10 likes in reply to #65 4mo
ML
m.lehtinenTL221 Mar 2026#81

I would call the community position on pregnancy and pregnancy planning likely rather than established, and I would be comfortable defending that hedge.

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CC
c.cardosoTL222 Mar 2026#82

Appreciated. The plain phrasing does more work here than a longer post would.

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f.sjobergTL223 Mar 2026#83
r.girard, post #28: Body weight at the extremes of the studied range affects exposure and the trials rarely reported enough to say by how much. Go to post

Genetic and ancestry-related differences in response are asked about regularly and the published evidence is thin enough that the honest answer is short.

0 likes in reply to #28 4mo
DO
dr_okonkwoTL4 Moderator24 Mar 2026#84
buffer_review, post #47: The reason pregnancy and pregnancy planning is hard to answer is that the obvious measurement and the relevant quantity are not the same thing, and substituting one for the other is silent. Go to post

Pregnancy and pregnancy planning is a question about a distribution, not about a value, and treating it as a value is what produces the confident wrong answers.

1 like in reply to #47 4mo
ML
m.lindqvistTL225 Mar 2026#85

Taking post #84 at face value and following it one step further.

The most useful reply I ever got about pregnancy and pregnancy planning was a request to state my units. It sounds like pedantry and it has saved me twice.

0 likes 4mo
RR
r.restrepoTL226 Mar 2026#86

Post #83 and I disagree about the size of the effect, not about the direction.

Extrapolating a point estimate to somebody well outside the enrolled range should be described as an extrapolation every time it is done.

0 likes 4mo
CL
c.lundgrenTL226 Mar 2026#87
p.novotny, post #39: Same experience here, different supplier, so it is at least not unique to one of them. Go to post

Summarising the pregnancy and pregnancy planning thread so far, since it is long and the answer is buried: the first reply has the method, the fourth has the correction to it, and the rest is people agreeing at length.

0 likes in reply to #39 4mo
NN
n.nybergTL227 Mar 2026 · edited#88

Counterpoint on pregnancy and pregnancy planning, offered without confidence: the same observation is consistent with a much duller explanation, and nobody has ruled the dull one out.

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i.almeidaTL228 Mar 2026#89

Dedicated trials in under-studied populations are the only real remedy and several are ongoing, which is worth saying rather than speculating.

0 likes 4mo
DS
dr_seongTL3Physician29 Mar 2026#90

Pregnancy and planning: these compounds are not approved for use in pregnancy. Planning windows (how long to wait before attempting pregnancy) are not formally established. Conservative approaches wait several months to allow clearance.

3 likes 4mo