A widely repeated interaction claim that turns out to be unsupported posts 31–52

I had written a reply contradicting post #29 and deleted it. Here is what survived.

The documentation on widely repeated interaction claim is better than this thread and I say that as someone who has posted in the thread.

That is a cleaner way of putting what I was circling around.

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.

A pharmacist can answer most questions in this subcategory in a few minutes with access to a proper interaction database, and that access is the thing a forum does not have.

The mechanism is plausible, which is not the same as established.

SGLT2 inhibitors: frequently co-administered and relevant to renal and cardiovascular discussion, not to interactions. There is no pharmacokinetic interaction of concern.

I am not the right person to answer the follow-up to this.

Post #33 is the version of this I will quote in future. One addition.

Second-hand on widely repeated interaction claim, so weight it accordingly — someone whose method I trust told me this and I have not verified it myself.

Research-use-only compounds have no interaction data of any kind, because interaction studies are done on medicines being developed for use in people.

Insulin and sulfonylureas are the interaction that the labelling in this class flags most explicitly, because the risk is additive glucose lowering. That is a prescribing question and not a forum question.

Supplements and herbs: many have no established interaction. Some do. If you are taking something unusual, checking a reference (like a pharmacist) is more useful than guessing from forum discussion.

Absence of an interaction study is not evidence of no interaction. A great many combinations discussed here have simply never been studied, and saying so is more useful than reasoning from mechanism alone.

That has held every time I have looked, which is not the same as always.

Post #38 is right about the mechanism and I think understates the practical bit.

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.

Widely repeated interaction claim is well covered in the tag pages, and the older discussions are better than the recent ones because they were argued out properly. Worth twenty minutes before adding to this one.

Alcohol is not contraindicated in the labelling and it does irritate a stomach that is already emptying slowly. There is no published interaction study, and the conservative reading is the obvious one.

Worth reading the earlier posts in this thread before acting on mine.

Anyone asking an interaction question should list everything, including the things they consider irrelevant. The irrelevant one is the answer more often than chance would suggest.

I would hold that lightly until someone with a larger sample weighs in.