Anticoagulants: no direct interaction with the compounds in this class. Weight loss and body composition changes might affect the clearance or effect of warfarin if you are on it; monitoring INR more frequently during weight loss is reasonable.
Alcohol: what is documented and what is folklore — the long version
Vitamins: most vitamins have no significant interaction. Fat-soluble vitamins (A, D, E, K) might be affected by the slowing of fat absorption during weight loss, but that is a nutritional consequence rather than an interaction.
post #2 is right about the mechanism and I think understates the practical bit.
Thyroid medications: semaglutide is associated with a slowing of gastric emptying, which might affect thyroid medication absorption if they are taken very close together. Separating them by a few hours is the conservative approach.
post #7 answers the question as asked. The question underneath it is different.
Insulin interaction: semaglutide and tirzepatide are not contraindicated with insulin but the combination carries hypoglycemia risk if insulin doses are not adjusted. That is a reason for close monitoring, not for avoiding the combination.
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.
Read the full topic (14 posts)
This topic was referenced in
- Levothyroxine timing: a real interaction with a simple fixPractice › Interactions · 24 replies
Suggested topics
| Topic | Participants | Replies | Views | Activity |
|---|---|---|---|---|
|
[2026 update] Insulin combinations and hypoglycaemia risk
Insulin combinations and hypoglycaemia risk Writing it up because I had to work it out twice and would rather nobody else did. Practical question with the units stated, because I have seen how quickly these…
|
2 | 2.8k | 20mo | |
|
Oral contraceptives and delayed emptying: what the data shows
Posting this under the heading it deserves: Oral contraceptives and delayed emptying: what the data shows Everything below is what sits behind that. Reporting something rather than asking about it, in case…
|
+63 | 71 | 5.9k | 2y |
|
Follow-up: Reading an interaction checker output critically
Reading an interaction checker output critically — setting out what I have, and where I think it stops being reliable. I have read the maintained page on this and I still have a gap, so I am asking rather…
|
+62 | 66 | 13k | 2d |
|
Anaesthesia and elective surgery: the aspiration question — does this still hold?
Anaesthesia and elective surgery: the aspiration question — does this still hold? I have a specific reason for asking rather than idle curiosity, and the context is below. Practical question with the units…
|
+23 | 27 | 5.6k | 17mo |
|
Antibiotics and a course of something with delayed emptying
Antibiotics and a course of something with delayed emptying — setting out what I have, and where I think it stops being reliable. Reporting something rather than asking about it, in case the pattern is useful…
|
+99 | 108 | 1.4k | 12mo |
Related topics — sharing the tags insulin, needs a source, delayed gastric emptying
| Topic | Participants | Replies | Views | Activity |
|---|---|---|---|---|
|
Follow-up: An emergency department visit, described afterwards
On the subject in the title: An emergency department visit, described afterwards Working notes rather than a conclusion. General question, not a request for advice about my own care — I know the difference…
|
4 | 18k | 1mo | |
|
Evidence quality in the secretagogue literature: an honest assessment
Evidence quality in the secretagogue literature: an honest assessment Writing it up because I had to work it out twice and would rather nobody else did. Comparing SURMOUNT-OSA ( N Engl J Med , 2024) with STEP…
|
2 | 25k | 9d | |
|
Revisiting: Absolute versus relative contraindications
Revisiting: Absolute versus relative contraindications Writing it up because I had to work it out twice and would rather nobody else did. Asking about a population rather than about a person. The published…
|
+11 | 15 | 22k | 5mo |
|
Compounds this community declines to help with, and why
Compounds this community declines to help with, and why — setting out what I have, and where I think it stops being reliable. Comparing LEADER ( N Engl J Med , 2016) with SCALE ( N Engl J Med , 2015) and…
|
+81 | 87 | 35k | 10mo |
|
Follow-up: Tesamorelin has an approved indication — what that changes about the evidence
Posting this under the heading it deserves: Tesamorelin has an approved indication — what that changes about the evidence Everything below is what sits behind that. Comparing STEP 8 ( JAMA , 2022) with…
|
+63 | 68 | 18k | 14mo |