Bontril is an ideal way to jumpstart any weight management program. Prescribed for short -term use, Bontril is best taken on an empty stomach, about 30 to 60 minutes before breakfast. Moderately, habit-forming, Bontril can be used between 8-12 weeks. The most prevalent site events are blurred vision, dizziness, dry mouth, sleeplessness, irritability, stomach upset or constipation. Prior to using Bontril, a physician should be notified of the user’s complete medical history. (Over-usage of anorectic agents similar to Bontril may cause an increased risk of developing pulmonary hypertension.)