Main Article Content
To determine knowledge and clinical outcomes of oral contraceptive use among reproductive females at Ongkharak district, Nakhonnayok province. The survey research was conducted in reproductive females taking oral contraceptive pills to reduce the risk of pregnancy at Ongkharak district. Data were collected by research questionnaire developed by the researcher. 162 subjects participated in this study. The mean score of knowledge of oral contraceptive use was 3.18 ± 1.11 of 8.00 total scores (80.9%). Most participants had moderate level of their knowledge. Clinical outcomes included efficacy and adverse events of oral contraceptive use. 20.4% of total failed to control birth despite using contraceptive pills. 46.3% had adverse events, such as dizziness, nausea, vomiting, acne, melasma, increased body weight. There was no statistically significant correlation between knowledge of oral contraceptive use and clinical efficacy. Reproductive females at Ongkharak district, Nakhonnayok province had moderate level of knowledge of oral contraceptive use and marked high rate of unintentional pregnancy.