Blood sugar fluctuations are common after managing diabetes for 15 years. However, your fasting level of 180 mg/dL and post-meal level of 300 mg/dL indicate your current regimen is no longer providing adequate control. Over time, the body's natural insulin production decreases, meaning your medication likely needs an adjustment. Your doctor may consider safely increasing your current doses, adding another oral medication, or introducing insulin therapy. Please consult your physician soon to update your treatment plan, and keep tracking your levels. We will work to get your numbers back into a safe range.