actually there are not many available around here, each pharmacy only had 1 bottle, there is pinex, or reese's pinworm medicine, each is a dose and a half, approximately, so I would buy a few boxes, I know walgreens have them, they were 10.99 a box around here, I heard Walmart, but I think cvs's stop selling them, I took a whole cup dosage, but due to all of this I have gained 40 lbs in 4 months so u may b much smaller, it has a weight chart and u take the dose according to wieght