AGE: You must be at least 18 years old to donate to the general blood supply. There is no upper age limit for blood donation as long as you are well with no restrictions or limitations to your activities.

HIGH BLOOD PRESSURE: Acceptable as long as your blood pressure is below 180 systolic (first number) and below 100 diastolic (second number) at the time of donation. Medications for high blood pressure do not disqualify you from donating.

BODY PIERCING: You must not donate if you have had a tongue, nose, belly button or genital piercing in the past 12 months (donors with pierced ears are eligible).

CONSUMPTION OF ALCOHOL: You will not be eligible to donate blood if you have consumed alcohol 48 hours before donation.

SMOKING: Please avoid smoking on the day before donating. You can smoke 3 hours after donation.

TATTOOS: One-year deferral.

COLD & FLU: Wait if you have a fever or a productive cough (bringing up phlegm). Wait if you do not feel well on the day of donation. Wait until you have completed antibiotic treatment for sinus, throat or lung infection.

DIABETES: Acceptable as long as it is well controlled, whether medication is taken or not.

DIET: A meal is recommended at least four hours prior to donation. Drink plenty of fluids.

MSM: Men who have had sex with other men, at any time since 1977 (the beginning of the AIDS epidemic in the United States) are currently deferred as blood donors. This is because MSM are, as a group, at increased risk for HIV, hepatitis B and certain other infections that can be transmitted by transfusion.

WEIGHT: You must weigh at least 110 pounds (50 kg) to be eligible for blood donation for your own safety. Blood volume is in proportion to body weight. Donors who weigh less than 110 pounds (50 kg) may not tolerate the removal of the required volume of blood as well as those who weigh more than 110 pounds. There is no upper weight limit as long as your weight is not higher than the weight limit of the donor bed or lounge you are using. 

TRAVEL : People who have traveled to or lived abroad in certain countries within 3 months may be excluded because they are at risk for transmitting agents such as malaria or variant Creutzfeldt-Jakob Disease (vCJD) but you can always assure by channeling the doctor at the campaign. 

Other criteria that will be assessed at the time of donation such as (list is not all inclusive):

Hemoglobin, Travel, Cancer, Medications, Hepatitis, and HIV Risk:
Intravenous drug abusers: HIV, HBV, HCV and HTLV
Transplant patients: animal tissue or organs.

Source : National Blood Transfusion Service, Sri Lanka. 

Basic Eligibility Guidelines.

Things to keep in mind