Hi, I need to get something off my mind so I thought you could help me. A while ago I donated blood in the morning after having taken a painkiller the night before. The painkiller contained 250 mg of paracetamol and 10 mg of codeine. I told the doctor I had taken it, but I said I had taken it 3 days earlier since I didn't want to get rejected and I thought that, because of substance dilution in the blood, the fact that at least three or even four elimination half-lives had passed, the amount of medication present in the donated blood was negligible. I thought this because I am a pretty large guy, I am 25, I am roughly 6 feet tall (183 cm) and I have roughly 202 pound (92 kg-93 kg). Consequently I thought that, since I probably have around 5700 ml of blood and blood donation is only 450 ml, that the substance would be more than diluted in my body. The doctor wrote down that there could still be some paracetamol present in my blood and she let me donate. Nonetheless, I am now really worried that because of my stupidity and recklessness, my blood might have hurt someone. My biggest concern is that, the amount of codeine that was still present in my blood, as tiny as it might have been, might have interfered with the platelet function in my blood and that these "broken" platelets may have hurt someone in some way. I am not sure if this is true, but I did read that codeine has this effect. Is there any reason for me to worry? Thanks in advance.