Due to having severe acne for 12 years I was referred to a dermatologist to be put forward for roaccutane. As everybody knows, it's a very serious drug and has dangerous side effects. Because of this I'm having to have monthly blood tests, pregnancy tests. My first blood test established that I was severely anaemic and I've never been told before? My ferritin level came back as 3.9... I was on the verge of a blood transfusion and my dermatologist and doctor were shocked I wasn't experiencing lethargy etc. I've been prescribed ferrous fumarate (210mg) to take 3x daily. Does anybody know how long its going to take to get my iron levels back up to a reasonable level?