Solutions intended to be taken orally are called oral solutions. Their advantages include faster absorption from the gastrointestinal tract, uniformity of dosage, safe means of administering substances such as potassium iodide, which cause gastric pain and attractive appearance of the product. For drugs that are slowly soluble, the rate of dissolution may be enhanced by application of heat. However, this approach is suitable only for thermostable drugs. There may be a possibility of chemical interactions between the various components of a solution leading to alteration in the preparation’s stability and potency. Liquid pharmaceuticals for oral administration are usually formulated and administered in a convenient volume, such as 5 ml, 10 ml or 15 ml. Solutions for pediatric use are given by drops, with the help of a calibrated dropper supplied within the product package. The strengths of pharmaceutical preparations are usually expressed in terms of % w/w, % w/v and % v/v.