Based on my experience after receiving my 10th of 12 treatments (yes, that two rounds over 4 years), the first 6 being the original clinical trial, here are my comments.
I get a little bit of radiation sickness the day after with milder symptoms the following few days. A mild headache, upset stomach and a little fatigue. Mostly annoying. A very mild diet of mostly chicken noodle soup and mashed potatoes is my comfort food. I take pepsid (not Pepsi) to reduce stomach acid starting the day before and as needed for several days after each treatment. And, I keep Tums and some antinausea tables (left over from my chemo) nearby to settle that jumpy stomach. It really hasn't been too bad at all.
The Pluvicto literature describes the radiation precautions based on it's half life of about 6-7 days. It's 3 days of not sleeping beside or spending hours within a few feet of someone including pets, babies, pregnant women, etc. But, you can be in the same room while staying a reasonable distance apart. The radiation is expelled mostly through body fluid; urine, saliva, sweat, exhaling vapor, etc. I store and wash my close separately for a week or so, don't share food, towels, etc. I carry a pocket size geiger counter (from my clinical trial days) and can see exactly how quickly the radiation value declines, comparing them to published charts. In 4 or 5 days, I return to a normal life being a little cautious. Drink lots of fluids to flush it out of your bladder and colon. You don't want that radiation hanging around there too long.
I could go on, but in reality, FOR ME, it's not a big deal. Listen to to radiation specialists and use common sense. The more you educate yourself, the easier and less fearful it will be. Just do it.