What Causes Clots And Heavy Bleeding During Period?

Hi My sister had a 3-4 week period last month with clots and heavy bleeding and pains her partner went the chemist and gave her some injections. This month it s the same and she feels shaky and he s given her injections again but this time the bloods red and more clots. My mum has asked what the injections are and my sister said they say lutofolone and oestradiol benzoate . We are really worried as she s in Egypt and were in the uk.