The Depends doesn't seem to cut it lately. Reddit and AI says Megamax is the next level up? Does this match your experience? I'm sure the increased incontinence flow is tied to the Alzheimer's progressing. Today she couldn't find the bathroom that was 5 feet away.
UnderX is the only one that lasts at least that long.
When he kept insisting he could take care of himself if I die, I suggested a 24 hour trial/test. Not only did he call it quits in 20 hours but I also found out he hadn’t changed his incontinence briefs all that time. Still, no leaks! Not that I recommend wearing them that long but they are the best we’ve ever used.
Megamax are great and work well. We tried many diaper and insert brands before settling on this combination:
We like Prevail Breezers Adult Incontinence Briefs with Tabs which we get through Carewell.
https://www.carewell.com/product/prevail-breezers-adult-diapers-with-tabs-ultimate/?sku=PVB-013%2F2-CS72
For a pad insert we use NorthShore Booster Pad Diaper Inserts. They have a flow through design so add extra absorption. We use 2 at night.
https://www.northshorecare.com/incontinence-products/diaper-booster-pads/northshore-booster-pads-contoured-diaper-doublers
And it's ok to acknowledge this is a hard transition time - you're not alone!
my mother used on last time she was in the hospital. It worked amazingly well.
She will need tabbed briefts (Adult Diapers). They are more absorbent.
You may have to try several different brands, sizes and styles to find what works best for the patient. I have found that some of the super absorbent diapers tend to be more bulky and stiff in between the legs, which can alter the fit. Some less absorbent are softer and more flexible in between the legs, but will have to be changed sooner. My current favorite is the McKesson tabbed briefs. They are a softer, more flexible material which fits nicely, and are very absorbent - even the moderate absorbency. You can buy them online from Medical products suppliers, like Carewell, or Vitality Medical (both very good).
She will probably need help putting them on. A nurse or a CNA can show you how to do it properly. You may want to hire a caregiver to take care of this if it is too difficult for you or the patient.
Another trick you can try - even with your current Depends - is to add an insert incontinence pad. These are like the pads women have been using for years for menstrual flow. You can even double up on the Depends underwear - that is, simply wear one pair over another.
It is also time to buy incontinence Underpads for the bed and furniture, if you have not already. You want them to be roughly 30" x 30".
We've used TENA Proskin Incontinence Super Briefs via Amazon.
'Dry Direct' also has some good maximum capacity briefs.
https://www.parentgiving.com/collections/dry-direct-by-parentgiving
It does sound like your wife probably isn't too far away from just going without a mad dash for the bathroom, which is okay--it might be easier as you can time her hydration intake to help keep her dry--maybe no fluids after dinner and a change right before bedtime.
You can try a PureWick which is an external catheter for women as well, which should help, especially overnight.
When my late husbands incontinence got so bad, his urologist recommended that he get a supra pubic catheter, which is a permanent catheter that is surgically placed right above the belly button. For us both it was a Godsend as we were finally able to sleep all night long without having to get up every hour on the hour to pee, as yes, I was having to get up with him.