Managing the sh*ts while living in a city

I've been lurking on here for a bit while I consider taking this plunge.

The horrible stories about (sorry!) constant explosive diarrhea are really making me think twice. There doesn't seem to be a rhyme or reason with types of food, dosage amounts, time on drug, etc. You just are always shitting.

I live in NYC and have to leave the house every day. While in transit, or even trying to just enjoy a walk, there would be no toilet access.

For those of you in a city or are frequently away from home, do you bring a change of clothes everywhere? Do you take Imodium all day every day (which I'm sure is not great for the liver)? Do you wear a diaper? 😩