Miralax normally works overnight but sometimes has been hit or miss for me and I've had to use 1-1/2 to 2 capfuls. I've also found Magnesium Citrate liquid solution to help when I'm really having a terrible bout of constipation but I absolutely hate the sweet taste 😝. My favorite aid is a night time cup of hot Prunelax tea (https://www.amazon.com/dp/B07DFSNYQW).

I've been experimenting the past 2 months and found that Heather's Tummy Fiber is helping with my bowel regularity but I haven't quite got it down to how much/little I need to use daily for my constipation. It can be used for both diarrhea and constipation. The only downside from my perspective is it takes a little more effort to mix it up with water as it doesn't mix well with hot or cold liquids. Works great in smoothies or mixed with food. - https://www.heatherstummycare.com/c/tummy-fiber/. I also like their Peppermint & Fennel tea bags which help with bloating/gas.

I would go with something stronger when this occurs, like a laxative pill that induces actual bowel cramping. It’s not fun, but you can use it to get back on track, then play around with something milder for daily use if needed.