The word communication originates from the Latin word communicare that means to do something in common. When human beings communicate with each other, we share thoughts, emotions, values and actions. The foundation in communication is found within the interpersonal communication, which is the act of communication between two persons. All types of communications include of verbal and nonverbal acts of communication. The verbal communication consists of words either in speech or writing, the nonverbal act implies gestures, frequency of the tone and facial expressions. Within the pharmaceutical profession, good communication between the pharmacist and the customer is important and can affect the customer’s health and quality of life in both direct as well as indirect ways. In recent years, the pharmacist's role in the pharmacy has drastically changed. Nowadays the care of the customer has gained more significance than before. To improve customer health and quality of life it is important that the pharmacist acts to promote a good relationship with the customer and the foundation for this relationship should be built on good terms of communication. The purpose of this study was to study how common it is with communication errors between pharmacist and customer, and to demonstrate probable underlying causes. Secondary questions were, how is the drug advice the pharmacist provides affected by communication errors? Collection of data for the study was done with structured observation charts, where the customer and pharmacist were strictly observed. A total of 316 meetings were observed and the data collected referred to prescriptions. In more than one-third of the observed meetings, there were communication errors between the pharmacist and the customer. Communication errors that arose concerned lack of eye contact, language barriers, choice of questions, background noise from colleagues and customers and discussions from generic exchanges. To reduce future communication errors, the pharmacist's actions should be strengthened, such as eye contact, clear follow-up questions and improved feedback.