Overactive thyroid (hyperthyroidism) and blood donation

Usually yes, with a small check first. Once your overactive thyroid is controlled and stable on treatment, donation is usually fine; uncontrolled disease waits. ## The short answer Uncontrolled hyperthyroidism stresses the heart, donation adds a small load your body should not carry that day. Stable levels, steady dose, feeling well: donate. Recently diagnosed or dose still adjusting: wait until settled. ## At the screening desk Tell the staff: Your latest TSH report if handy, and your tablet names. That conversation is confidential and takes a minute, it exists so the medical officer can clear you safely on the day. Everyone meets the same basics: age 18,65, weight 50 kg+, haemoglobin on target, feeling well today. Men donate every 3 months, women every 4, the rest rules, simply. Not sure about your case? Try the Can I donate? checker or read who can donate and the deferral list in plain words. Still weighing it? Is blood donation safe? and the honest side-effects list are straight answers, not brochure talk. ## The one line that matters The medical officer at the centre makes the final call on the day, with your name, your file and your actual reading in front of them. Use this page to walk in informed, not to overrule anyone. Related: can thyroid patients donate blood