High blood sugar, dizziness, and vision changes require a doctor's evaluation rather than self-medication. Dizziness can happen with fluctuating sugar levels, and eye changes need careful assessment to prevent long-term damage. You should not start any medication without a proper diagnosis. A doctor may prescribe generic medications like metformin to manage your blood sugar, but your specific symptoms need a tailored plan. Please schedule an appointment with your primary care doctor and an eye specialist (ophthalmologist) as soon as possible for a safe, accurate prescription. Meanwhile, monitor your blood sugar levels closely and stay hydrated.