Hello again, [...]. If you change your username, might I suggest “Heroic Husband”? The practical and emotional support you are giving your wife makes you a hero in my book!
Let me see if I can help with the terminology you’ve encountered, specifically titration and microtapering.
The medical definition of “titration” is adjusting the dose of a drug to maximize positive effects while minimizing negative ones. In the context of benzodiazepine withdrawal, titration means making “small enough” reductions in dose to keep withdrawal symptoms tolerable while discontinuing the drug. Individuals titrate their doses using solid dose formulations, liquid formulations, or a combination thereof.
“Microtapering” means making extremely small dose reductions measured in micrograms (1 microgram equals 0.001 milligram). Some individuals find this necessary whereas others do not. The potency of the benzodiazepine being tapered may also be a factor (more potent benzodiazepines may require microtapering whereas less potent ones may not).
The goal of tapering is to make “small enough” reductions in dose on a “gradual enough” interval to keep withdrawal symptoms tolerable for a given individual/benzodiazepine. A caveat is that what is “small enough” and “gradual enough” at one point in a taper may not be at another. One of the keys to successful discontinuation is flexibility - making adjustments in one’s taper plan as needed in response to withdrawal symptoms.
Given your wife’s recent setback, heightened anxiety, current dose, and taper phase, my inclination would be to err on the side of caution with the next reduction. Perhaps 5% or 1.81mg (95% of 1.9mg = 1.805mg, rounded up). If she does ok with that, you could try a slightly higher percent for the next reduction (e.g. 6%). Note that the percent reduction is calculated using the current dose. A 6% reduction from 1.81mg would be 1.70mg (94% of 1.81mg = 1.7014mg, rounded down).
Her uptick in symptoms on Days 10 - 12 makes sense given the long half-life of diazepam. That would be in the range of when the drug reaches a steady state concentration after the latest reduction.
While you and your wife are waiting for her to stabilize ... if you have not already done so, might I suggest you explore resources aimed at helping your wife (and you) cope during withdrawal and recovery? I’ve included one such resource below. Learning about and practicing good sleep hygiene is also important.
Lastly, you might find it helpful to read through some of the posts in the Support Group named “3,2,1: Under 3 mg Valium people” at
http://www.benzobuddies.org/forum/index.php?topic=151673.msg2035496#msg2035496Resource:
Cope, Take Care of Yourself, and Heal | The Withdrawal Project
https://withdrawal.theinnercompass.org/page/cope-take-care-yourself-and-heal