my grandaughter aged 15 next month, has been told she has low blood. The receptionist called to tell my daughter the results of the blood work saying she has blood quite a bit lower than average. The dr. wants her on iron and east lots of meat. Come back in 2 months and we will check it again. So my daughter talked to a pharmacist who gave her ferrous sulfate 300 mg. Take one pill every night with juice. After looking it up on line I am concerned about dosage . The doctor did not tell her what # her blood is at. I am taking my grandaughter away tomorrow for a week so I will be rsponsible for giving her medication. She takes no other meds.