I had to use one for my daughter when she was about two weeks old. My fiancé picked them up so they were just the CVS brand of children's glycerin suppositories. Her pediatrician just said don't use the liquid ones yet, and break off a little less than a quarter of the solid ones. I hated having to do those things to my baby!

Maybe try a "windi" instead/first. Made by the same company that makes those weird nose straw things. Insanely effective, disposable and not meds. I get mine at buy buy baby.