Most medications do not prevent you from donating blood. Common medications such as those used to control blood pressure, birth control pills and over-the-counter medications do not affect your eligibility. If you have recently taken antibiotics, you must have completed the course prior to donating.
Yes, a tooth infection can cause a headache. Also, be aware that certain sinus conditions can mask as tooth problems.
Symptoms of a toothache may include: 1  Tooth pain that may be sharp, throbbing, or constant. In some people, pain results only when pressure is applied to the tooth. 2  Swelling around the tooth. 3  Fever or headache.  Foul-tasting drainage from the infected tooth.