The "Epistula de sanguine humano" attributed to Arnald da Villa Nova envisages the use of distilled human blood for therapeutic purposes. Similar practice, with some substantial variants, can be also found in the traditional usages of ancient magic and popular medicine.
The usages of human blood in late medieval alchemical treatises / Cavarra, B.. - In: MEDICINA NEI SECOLI. - ISSN 0394-9001. - 17:3(2005), pp. 651-662.