Brief Answer:
Diabetes

Detailed Answer:
Sorry to learn about your high blood sugar.

You most likely have diabetes.

There is no quick fix for this. You will need to contact your health care provider immediately.
When I see someone like you in my practice, I typically order the following blood tests in addition to a detailed physical examination:

CBC (Complete Blood Count, also known as Hemogram; includes Hemoglobin, WBC and Platelet counts)
Electrolytes (Sodium and Potassium in particular)
HbA1c (Glycosylated Hemoglobin = your last 3 months' glucose average). Also known by other names such as GlycoHemoglobin or Glycated Hemoglobin or A1c
Liver function tests (SGOT , SGPT, Albumin, Bilirubin, Alkaline Phosphatase)
Kidney function tests (BUN, Creatinine)
TSH (checks your thyroid) 12 hour Fasting Lipid profile
Urine albumin to Creatinine Ratio (early sign of diabetes affecting the kidney)
25 hydroxy Vitamin D levels (ideal range 40 to 60 ng/ml = 100 to 150 nmol/liter)

Correct diagnosis and treatment requires the opportunity to examine the patient so you must see an endocrinologist in-person.

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Brief Answer:
Follow up

Detailed Answer:
I see.

Well the way to reduce it quickly will vary from person to person and also according to the pills one is on. I have my patients take an injection of Fast acting insulin in specific amounts to lower the glucose levels. I advise all my patients with persistent glucose elevations above 250 to go to the Emergency room

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