Alert your healthcare provider if you have pain during treatment.You may need several treatments with this medicine. Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of sitagliptin and simvastatin combination in the elderly. It is important that you learn which symptoms you usually have so you can treat it quickly. Use condoms or other effective birth control during treatment with this medicine.Females: This medicine may cause you to stop having periods. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.Using this medicine with any of the following medicines is not recommended. A more serious sunburn, known as a second-degree burn, causes damage deeper in the skin.This type of burn may cause blisters to form and takes longer to heal. Talk with your healthcare provider about this.Hair loss is common during treatment with this medicine. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:Other side effects not listed may also occur in some patients. Don’t use a cotton ball on the popped blister, as the small fibers may stick to the wound and increase the chance of an infection.If your blisters are severe, your doctor may prescribe a corticosteroid for the swelling and itching. Keep from freezing.Do not keep outdated medicine or medicine no longer needed.Ask your healthcare professional how you should dispose of any medicine you do not use.It is very important that your doctor check your progress at regular visits. Be sure to ask your doctor about anything you do not understand. This medicine may help prevent medical problems caused by clogged blood vessels such as heart attacks and strokes. This medicine should come with a Medication Guide. This is temporary and is not harmful.If your child is receiving this medicine, wear latex gloves when changing diapers to prevent contact with the child's urine or feces for at least 5 days after the last dose or as instructed by your healthcare provider.If this medicine leaks from your veins into nearby tissue, it may stain your skin brown or cause redness, pain, or blisters. A burn blister is a fluid-filled covering of skin that forms after a burn. Diarrhea after Eating: Causes and Natural Treatments While you are taking this medicine, avoid long exposure to the sun. Be careful while shaving, cutting fingernails or toenails, or when using sharp objects. When you’re going to be outside, apply sunscreen with an SPF of at least 30. What Are These Tiny Red Spots on My Skin (Petechiae)? Your doctor may decide not to treat you with this medication or change some of the other medicines you take.Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If your dose is different, do not change it unless your doctor tells you to do so.The amount of medicine that you take depends on the strength of the medicine. The following information includes only the average doses of this medicine. 10 Ways to Control Blood Sugar without Medication People feel different symptoms with low blood sugar. Using this medicine while you are pregnant can harm your unborn baby. Glucagon is a medicine that is used in emergency situations when severe symptoms, such as seizures (convulsions) or unconsciousness occur. If symptoms of low blood sugar occur, check your blood sugar level. Talk to your healthcare provider if you need birth control. This can require treatment and may lead to scarring.Severe sunburns — especially those severe enough to cause blisters — significantly increase your chance of Sunburn blisters can often be treated at home. Why Is My Skin Sensitive to the Touch? Flu vs a Cold: What’s the Difference? Also, do not have any vaccines without getting your healthcare provider's approval first.This medicine may cause your urine to turn a red color for up to 2 days and your clothing might be stained. Mayo Clinic is a nonprofit organization and proceeds from Web advertising help support our mission. Sunburn blisters can appear on the skin after severe sunburns, and they can be extremely painful. Call your doctor right away if you have dark-colored urine, a general feeling of tiredness or weakness, a headache, light-colored stools, loss of appetite, stomach pain, upper right stomach pain, vomiting, weight loss, or yellow eyes or skin.