[2026 update] What steady state means for the decision to escalate posts 61–90

This follows post #74 rather than contradicting it.

The thing about steady state 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.

Worth separating two things that post #72 runs together.

Steady state means the plasma concentration is stable from dose to dose. That happens around 4 to 5 half-lives. Before that, the concentration is rising with each dose. Escalating before steady state means escalating on incomplete information about the dose you are on.

Concentration and dose get conflated constantly in this subcategory. Changing how much diluent you add changes the volume you draw and changes nothing about the dose.

That is what I would do. It may not be what is correct.

Careful with the language on steady state. "Not detected" and "not present" are different findings and the first is a statement about the method.

Steady state means the plasma concentration is stable from dose to dose. That happens around 4 to 5 half-lives. Before that, the concentration is rising with each dose. Escalating before steady state means escalating on incomplete information about the dose you are on.

If it helps: the failure mode here is usually boring rather than dramatic.

Answering the question post #76 raises rather than the one it answers.

Steady state is a good example of a question where the honest answer is boring and the interesting answers are unsupported. I would go with boring.

Answering the question post #77 raises rather than the one it answers.

Titrating on tolerability rather than on the calendar: some people escalate when they tolerate a dose well, others escalate on the prescribed schedule regardless. The published trials used a calendar-based schedule. Tolerability-based escalation has no formal evidence base but is not uncommon in practice.

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

The arithmetic in post #81 is right; the assumption feeding it is the part to check.

An honest declaration on steady state: I have a prior here and it is strong enough that you should weight what I say downward. Stating it rather than hiding it.

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

Trying to state the steady state position in a way that someone who disagrees would recognise as fair, because I do not think the version in this thread passes that test.

Concentration and dose get conflated constantly in this subcategory. Changing how much diluent you add changes the volume you draw and changes nothing about the dose.

Marking that as an opinion rather than a finding.

That is clearer than the version I had in my head. Thank you.

Where I part company with post #85, and it is a narrow parting.

What I would tell a new member reading about steady state for the first time: the confident posts are not the reliable ones, and the reliable ones are longer.

The four-week escalation interval is a convention from the pivotal trials, not a pharmacological constant. The pharmacological argument is that with a week-long half-life, four weeks approaches steady state and you can assess the dose fairly. That is an argument for not going faster. It is not an argument against going slower.

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

I think the steady state question is answerable and has not been answered, which is a more optimistic position than most of this thread.

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