Yeah the chemists sell it. It comes in a large box it's a bit pricey tho so maybe look online as it was over a tenner in my local chemist but online was cheaper. If your iron levels are very low u can have up to 2 sachets over the day. But don't take additional iron tablets
Take both tablets with orange juice first thing in the morning on an empty stomach, then follow with a light breakfast. I don't do well with iron tablets either but according to my doctor the orange helps it absorb quicker so even if I puke after an hour I don't need to take more.