You may want to look into latex free condoms. I believe there is a birth control pill for men now aswell. She will also have some alternatives to go by. Good luck!
How can I have safe sex without a condom or pill. I am allergic to condoms and my girlfriend is allergic to birth control pills?
You need to look for latex free condoms, Condoms are always necessary for safe sex. While the pill, IUD, sponge, diaphram, etc. All provide birth control. They do not protect against infections, which is what is needed for safe sex.