What happens next? The pharmacy staff tries to track down the missing meds, too often from suppliers of questionable reliability. A bargaining process ensues, carried out by fax and email. Costs often rise drastically as demand outstrips supply. For example, the price of doxycycline, an antibiotic used to treat Lyme disease, jumped from about $2.50 to between $80 and $150 for a 60-pill, one month treatment. Magnesium sulfate (used to treat toxemia in pregnancy) went from $9 to $400 for 25 vials.