Demerol is a branded medicine used to manage short term pains. It is always advisable to buy Demerol with a prescription. Children and adlts both can consume this medicine as per the prescribed doses i.e 50mg and 100mg . It works in the brain to change the emotion and respond to the pain.  It also comes with several side effects like dry mouth, headache, low blood pressure and vomiting.you can buy Demerol online and even get it within one day.