Pharmaceutical marketing has become a major issue in pharmacology. Although pharmaceutical marketing has been taken as a normal exercise in marketing process, research evidence shows that it can have positive and negative effects. While marketing supports pharmaceutical companies to progressively market their products, it may have negative marketing effects on patients and healthcare providers. In essence, companies have put in place measures that are meant to limit and regulate advertising of drugs owing to the negative effects it may have on both consumers and healthcare providers. Advertising of drugs can provide useful information to consumer on the drugs and health care providers to assist them make appropriate decision on drugs but at the same time, it may have negative effects on both consumers and healthcare practitioners.