hi, Im just wondering if the medicine phentermine can cause any side effects such as absence of period. I have had my tubes tied for 3 years, and my fiance and i are sexually active but use no protection., I have never missed or been late as far as my period. I felt like a crazy woman, when I went to the grocery store to buy a test.I have been taking phentermine for 3 weeks now, and am a week late. Can there be a correlation?
Hi there, Thanks for your query. Phentermine is not known to affect periods (as per the literature of the manufacturing company. It is common for ladies to have an occasional delayed period, once in a blue moon. Chances of pregnancy are remote. You have neither mentioned your age, nor the reason for taking determine (which is used to reduce body weight). In case, you are overweight, please exclude hypothyroidism, which can cause irregular periods. As this is the first time of a delay in period, you need not be concerned about it. However, you should see your gynecologist if the next 2-3 periods become irregular.