Aim: To investigate how oral health in adults is affected by asthma and asthma medication treatment.  Method: The study design was a general literature review. A search for scientific articles was performed in the databases DOSS, CINAHL, and MEDLINE. A total of 17 scientific articles were selected for the result of the literature review based on relevant inclusion and exclusion criteria, keywords, and the quality of the review. Results: Asthma and asthma medication had an impact on oral health in adults. Studies showed a higher prevalence of dental caries and pathology of periodontal tissues, dry mouth, erosion damage, and poorer oral hygiene among adults with asthma compared to those without asthma. It was also found that adults with asthma who were undergoing medication treatment had an increased presence of Candida albicans in saliva. Other oral health-related conditions such as certain dermatological diseases and benign tumors were also found to be associated with asthma in adults. Conclusion: Adult individuals with asthma showed a higher prevalence of oral diseases compared to adults without asthma. Side effects as a result of medication treatment were an influencing factor in the occurrence of oral diseases in adult asthmatics.