1. Consult your pharmacist if you are also taking agents to dissolve blood clots because this medication could increase your risk of bleeding.
2. If you are diabetic, consult pharmacist before use because this medication can interact with your current medications
3. If you have taken this product before and experienced a severe reaction, do not use. Also if you experience any severe reaction while using, discontinue immediately and consult your pharmacist.
4. If you plan on having surgery while taking this product, discontinue use at least 2 weeks prior.
5. Consult your pharmacist if you experience any stomach pain, loose stools, abnormal bruising or bleeding, nausea, heartburn, chest tightness, fever, swelling of face/lips/tongue or throat, hunger, changes in blood sugar including: hunger, dizziness, shaking, fast heartbeat, confusion, or swelling.
References:
1. Shim SH, Kim JM, Choi CY, Park KH. Ginkgo biloba Extract and Bilberry Anthocyanins Improve Visual Function in Patients with Normal Tension Glaucoma. Journal of Medicinal Food. 2012; 15(9):818-823. dii: 10.1089/jmf.2012.2241
2. Natural Medicines Comprehensive Database. Bilberry Full Monograph. Stockton, CA: 2015.

If you have time check out this video of inspiration: https://www.youtube.com/watch?v=tXf9wgfv8lw