Both my children have been on aptamil pepti 1. My daughter initially was started on SMA althera which she hated and wouldn’t drink so I requested for aptamil pepti 1 because my son took to it well when he had it. It took a couple of weeks to see a difference with her poo’s (mucus in her poo was our issue) and she hasn’t had any problems with it
I tried a number of hypoallergenic formulas and none of them worked for us. Obviously depending on your reasons for having to have the prescribed milk but we switched to goats milk which a lot of people recommended and it’s been amazing for us!