how soon after you give blood can you give blood again
You must wait a minimum of 56 days between whole blood donations. You must wait at least 72 hours after donating blood before you can donate platelets. After an automated double red cell collection, you must wait 112 days before donating again. You can donate platelets once in a seven-day period and up to 24 times a year. You must wait at least 72 hours after donating platelets before donating whole blood. After an automated double red cell collection, you must wait 112 days before donating again. In any eight-week period, you can make one blood donation and one platelet donation or six platelet donations.