Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh.
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
Dear questioner, we would like to commend you for showing keenness on getting acquainted with the teachings of Islam. We would like also to thank you for the great confidence you place in us, and we implore Allah Almighty to help us serve His cause and render our work for His Sake.
Contemporary Muslim jurists unanimously agree that blood transfusion for medical purposes is permissible. A Muslim is allowed to receive and donate blood for medical reasons. In Muslim countries it is very common nowadays to find that religious scholars and Imams are asked to urge people to make blood donations to hospitals for public welfare. These matters are related to human life. Islam teaches us to feed the hungry, to take care of the sick and to save people's lives.
However, as Sheikh Ibrahim Desai states, the permissibility of blood donation or blood transfusion is determined by the following conditions:
a) The donor should donate his blood willingly. If he is compelled to do so, then it is not permissible;
b) There is no danger to his (the donor's) life or health;
c) It must be clarified by the doctor that blood transfusion is necessary otherwise the life of the patient will be at stake; i.e. the recovery can not be possible without blood transfusion.
d) It is not permissible to sell one's blood or to pay the blood donor. However, if one is desperate for blood (to save his life) and the only means to obtain it is to purchase it, then it is permissible to pay for the blood. [In this case, it is only the one who asks for the money that will incur the sin].
You can also read:
Blood Donation to Non-Muslims
Donating Blood while Fasting
