Even bicycling, riding motorcycles or ATVs, or riding horses have been shown to elevate PSA slightly for a short period of time.. Can I have sex before I take a PSA test? World Blood Donor Day This sudden drop causes some people to pass out while they give blood. I'm usually one of those guys who can drink a whole pot of coffee and not really feel any effects from the caffeine. This morning I gave blood and they didn't tell me anything about what to eat or drink after. On the morning before you donate, the American Red Cross recommends drinking an extra 16 ounces of water before your appointment and eating a healthy meal with iron-rich foods in it. I stopped by Starbucks on the way to work right after that and got a 16oz Christmas Blend coffee (very good btw). Can drinking too much coffee cause celiac? Yes, you can drink coffee. Eat before and after blood donation to avoid fatigue Dos and donts of blood donation 3 min read. Donating blood lowers levels of key nutrients the body. Blood donors must have had no dental work or antibiotics three days prior to the donation.Neither should have any body tattoos applied on their bodies in the past twelve months. Learn More. One thing to avoid before donating: caffeine. Iron. My vein had collapsed, blocking the blood flow. why can't you drink coffee after donating plasma & what are the effects if you do? The blood contains iron, and each donation If they gave you any instructions, follow them. A cup of coffee usually has about 7000 chemicals. That doesnt mean you should chug coffee before giving blood. The fluids that you lose during donation can cause a drop in blood pressure causing you to feel faint and dizzy. 1 doctor answer. Cant drink coffee before I eat! No. Can You Drink Coffee Before Donating Blood? A Verified Doctor answered. By eating and drinking certain foods, a person can help their body recover. Fasting tests restrict everything but water. Sudden decreases in blood sugar level also cause fainting during blood donation. Almost half of the blood that you donate is made up of water. If you're wondering whether or not you can have coffee before a blood test, ask your doctor if you need to fast. To help prevent this from happening we ask you to drink 500ml of water immediately before you donate - well give this to you before you donate. She suggested that I start drinking Powerade or Gatorade at least 48 hours before donating blood, as the salt in those drinks can help expand small veins like mine. Coffee would not be the way they want you to take fluids, but that, juice, water etc would be fine. Updated: 17 Jun 2013, 07:45 PM IST Kavita Devgan. It can be a very mild diuretic at times, so thats probably not a good thing, Gottschall said. Fasting tests restrict everything but water. You should abstain from sexual activity - anything that includes ejaculation - for at least 24 hours before the test. Avoid exercise for a few days before your PSA test. Because of that, I wasn't able to donate that day. Before donating blood, just keep in mind to drink lots of fluids more than you normally drink on the day that you plan to donate your blood. Well, Hell,no! Preparing for your blood donation boils down to taking good care of yourself. If you're wondering whether or not you can have coffee before a blood test, ask your doctor if you need to fast. Typically before a blood test, they want you to be well hydrated. Consume I was just diagnosed with hashimoto's and now I think I have celiac. During the blood collection process, blood volume decreases, causing a sudden drop in blood pressure.