There are several ways to lower your blood sugar levels instantly. Here are a few:

1. Exercise: Physical activity can lower blood sugar levels by helping your body use insulin more efficiently. Even a short walk or other light exercise can help to lower your blood sugar levels.
2. Drinking water: Dehydration can cause blood sugar levels to rise, so drinking water can help to lower them.
3. Eating a high-fiber snack: Foods high in fiber can help to slow the absorption of sugar into the bloodstream, which can help to lower blood sugar levels. Examples of high-fiber foods include fruits, vegetables, nuts, and whole grains.
4. Taking a prescribed medication: If you have been prescribed medication to lower your blood sugar, such as insulin or a sulfonylurea, taking the medication as directed can help to lower your blood sugar levels.
5. Taking a prescribed oral medication like Metformin, can help lower blood sugar levels, it works by decreasing the amount of glucose produced by the liver and increasing insulin sensitivity.

It is important to note that if your blood sugar is very high, you should seek medical attention immediately. Additionally, if you have diabetes or are at risk of developing diabetes, it’s important to work with your healthcare provider to develop a plan for managing your blood sugar levels. This may include regular monitoring, lifestyle changes, and medication.