A painkilling, anti-inflammatory drug may help prevent headaches in Muslims fasting from dawn to dusk for Ramadan, according to a study from Israel -- where a “Yom Kippur headache” is also known. About four in every ten people who abstain from food and water all day during the month-long Ramadan period get headaches, said the study, published in the journal Headache. This year, Ramadan began on August 1.