Does drinking squirt soda affect my prescription of simvastatin? i drink water at night when i take my meds but during the day i drink a squirt when i eat lunch or dinner?

There should not be any impact. If you are concerned about some grapefruit in the Squirt and some cholesterol medications say to avoid this, it still is not likely a concern due to the small amount (if any) in the soda. A bigger concern wound be the sugar in the soda and the nutritional make up of your lunch and dinner. Eat healthy, drink healthy, be healthy.