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Dr. David Drewitz

Gastroenterology
Phoenix, AZ
28 years experience male

Locations

Arizona Digestive Health

Phoenix, AZ

Address

9305 W. Thomas Rd Suite 370, Phoenix, AZ
Directions

My office hours

Wednesday: 8:00am - 5:00pm
Show more

Fax

(602) 264-5646

Arizona Digestive Health

Phoenix, AZ

About

Bio

I am a board certified Gastroenterlogist with a private practice in Phoenix, AZ since 1997. My specialty is focused on helping patients with digestive, liver and weight related disorders create optimal health and improve their longevity.

Specialties
Doctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.

Gastroenterology

Licenses

United States: Arizona

Languages spoken

English

Doctor Q&A

502 Answers
25 Agrees
The number of answers this doctor has agreed with.
A 18-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Many causes...: Tenderness above the belly button is associated with multiple possible causes from functional causes like gas to mechanical causes like hernia. Persi... Read More
A 26-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
IBD > IBS: Presence of inflammation in the intestine found at colonoscopy is more consistent with Inflammatory Bowel Disease (IBD) than IBS. Discuss biopsy resul... Read More
A 74-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Maybe: Greek yogurt contains some lactose sugar and lactose intolerance could give you diarrhea. Colitis flare could also cause diarrhea regardless of your f... Read More
A 49-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Yes...: Eradication of h pylori after antabiotic therapy can be confirmed with either a highly sensitive urea breath test or stool antigen test. If either of ... Read More
A 34-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Cramps...: Pain in the left lower abdomen could mean a number of problems ranging from functional to serious. If the symptoms don't improve with diet or otc dige... Read More
A 24-year-old male asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Can't be done...: Fat cells can't be killed, but they can be shrunk by eating less and exercising more every day. Good luck!
A 28-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Weight loss...: If you are ingesting fewer calories than you are expending and not losing weight their may be a hormonal reason or other cause. Firstly make sure you... Read More
A 22-year-old male asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Yes...: Symptoms of ibs can overlap with many other pathological entities and evaluation might be necessary to tease out the proper diagnosis. Good luck!
A 43-year-old male asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Yes...: Contaminated needle stick injury and contact with infected blood and an open cut or wound are risk factors for transmission of hepatitis c. See your ... Read More
A 23-year-old male asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Cortex...: Our higher brain functions allow us to suppress certain biological signals in favor of acting on other more powerful drives or priorities. Good luck!
A 28-year-old male asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Pulled muscle...: Voluntarily induction of vomiting is never recommended and it sounds like you injured a muscle or connective tissue on the right side of your chest. T... Read More
A 22-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Uncertain...: There is no association between cessation of bcps and your symptoms that i'm aware of. If they persist, see your doctor. Good luck!
A 59-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Doubtful...: Symptoms are more consistent with diverticulitis, though pancreatitis would be a consideration given the information available. He should see his doc... Read More
A 55-year-old male asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Don't do it: Amoxicillin is not the proper antibiotic to take for suspected diverticulitis and potentially could make you worse. Better off waiting till diagnosis... Read More
A 49-year-old male asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Constipation...: Your symptoms are indicative of GI tract dysfunction. Whether this is a mechanical problem vs. Functional motility disorder is unclear. Stop self-tr... Read More
A 21-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Bleeding where?: Where are you bleeding from? Rectal bleeding most commonly would be from a hemorrhoid or fissure. Other possibilities in young people with diarrhea ... Read More
A 29-year-old male asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Hyperbilirubinemia..: A common cause for elevated bilirubin in an otherwise healthy person is a genetic condition called gilbert's syndrome which requires no treatment. Fol... Read More
A 16-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Fad diet...: Hcg is a fad diet of unproven safety. Most diets of any kind will help you lose weight but due to an imbalance of macronutrients you end up losing va... Read More
A 46-year-old member asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Endoscopy: Upper endoscopy (egd) is the procedure of choice if you have had frequent acid reflux, indigestion or heartburn for more than 6 months. The egd allow... Read More
A 18-year-old member asked:
Dr. David Drewitz
Gastroenterology 28 years experience
See a doctor...: Heartburn is very common. There are many causes including impaired esophageal motility, lower esophageal sphincter problems and hiatal hernia. Certai... Read More
A 19-year-old male asked:
Dr. David Drewitz
Gastroenterology 28 years experience
No...: Anything called a "tonic" or "cleanse" has no proven value and quite possibly could make you sick. Good luck!
A 44-year-old member asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Fermentation: Trillions of bacteria call your colon home and they release gases as a biproduct of their breakdown of undigestible carbohydrates and fiber reaching t... Read More
A 24-year-old male asked:
Dr. David Drewitz
Gastroenterology 28 years experience
More cushion...: You may need to have your hemorrhoids treatted or perhaps a thicker bicycle seat cushion would prevent them from getting too irritated. Good luck!
A 34-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
No...: Any polyp > 1 cm in size might be considered significant or large.
A 45-year-old member asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Maybe...: There are variable degrees of bowel obstruction and with progressively higher degrees of obstruction you may stop passing gas. Usually at this point ... Read More
A 45-year-old male asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Yes...: Irritable bowel syndrome (ibs) is a very common functional bowel disorder. It causes abdominal pain and cramps most commonly in the left lower abdome... Read More
A 17-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
No matter...: It does not matter if you take MiraLAX (polyethylene glycol) with food or not. The important thing is to follow the glass of MiraLAX (polyethylene gly... Read More
A 45-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Few possibilities...: Rib pain is frequently caused by inflammation of the intercostal ligaments and muscles called costochondritis. Other possibilities however include pn... Read More
A 37-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Yes.: There should be no increased side effects with 40 mg of Omeprazole over the 20 mg dose. Long term concerns of any dose of ppi include micronutrient m... Read More
A 25-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
IBS...: Passage of ano-rectal mucous in the absence of other symptoms, is usually a benign symptom seen in patients with ibs (irritable bowel syndrome). If y... Read More
A 39-year-old member asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Gluten...: Gluten is in wheat, barley, oats and bran. To avoid gluten completely you would have to avoid eating anything containing these grains. Good luck!
A 19-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Reflux...: Eating too fast or too much of the wrong things can lead to reflux. Burping can be a symptom of reflux or simply aerophagia caused by swallowing too ... Read More
A 40-year-old member asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Liver inflammation..: Liver enzyme elevation usually is a sign your liver is inflamed or irritated. There are many potential causes the most common of which is fatty liver... Read More
A 19-year-old male asked:
Dr. David Drewitz
Gastroenterology 28 years experience
More fiber?: Perhaps more fiber in your diet, drinking more water daily, adding more motion in your lifestyle or more frequent exercise will help. Adding a stool ... Read More
A 45-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Many causes...: Abdominal bloating is common. A few causes include colonic bacterial dysbiosis, irritable bowel syndrome, or small intestinal bacterial overgrowth. T... Read More
A 33-year-old male asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Couple suggestions..: Try taking a probiotic supplement. This can restore balance to the bacterial flora in your gut and cut down on bacterial fermentation of foods. Also,... Read More
A 38-year-old member asked:
Dr. David Drewitz
Gastroenterology 28 years experience
See your doctor...: Blood in the stool or rectal bleeding can be a sign of a potentially serious problem. Hemorrhoids are a common cause of these symptoms but get yourse... Read More
A 25-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
See your doctor: Painless rectal bleeding in someone your age is most likely caused by a internal hemorrhoid. Avoid constipation and take a stool softner if needed. T... Read More
A 44-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Get a work-up: Rectal bleeding is a sign that something is wrong. There are many causes of rectal bleeding that are both benign and serious. Don't mess around, se... Read More
A 40-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Lactulose: Lactulose contains a poorly digestible sugar and is well known for causing gas. Consult with your doctor about stopping it as you may not need it whi... Read More
A 37-year-old male asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Balneol...: Balneol (otc) is a hygenic cleansing lotion that helps sooth dry irritated perianal skin. Apply it several times per day.
A 42-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Many possibilities..: Upper abdominal pain is associated with many causes. When the pain radiates from the front of the abdomen through to the back we consider problems wi... Read More
A 32-year-old member asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Diet and drugs...: First line of treatment is dietary and lifestyle modifications. Elimination of food and beverage triggers (e.g. Alcohol, citrus, tomato sauce, chocol... Read More
A 23-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
IBS?: Your symptoms are common and unfortunately not specific for any one problem. Statistically the most common diagnosis would be irritable bowel syndrom... Read More
A 34-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Anemia?: Craving ice, known as pica, might be a symptom of iron deficiency anemia. Other signs or symptoms of anemia might be skin pallor, feeling tired or le... Read More
A 48-year-old member asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Neither...: The safest and most reliable to permanent weight loss is healthy lifestyle modification and a balanced low calorie diet. A consistent calorie deficit... Read More
A member asked:
Dr. David Drewitz
Gastroenterology 28 years experience
Yes and yes...: Hepatitis c is a viral infection passed via the parenteral route i.e. Blood. The blood of the infected person must get into the blood of the recipien... Read More
A 23-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
GI eval: Allergy testing for work-up of abdominal pain in absence of allergic symptoms i.e. Hives or oral allergy symptoms is rarely helpful. See your GI for ... Read More
A 17-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
No...: Mucous in the stool is not a sign of any particular pathology and is most commonly associated with irritable bowel. I'd suggest you see your doctor f... Read More
A 44-year-old female asked:
Dr. David Drewitz
Gastroenterology 28 years experience
IBS?: Your symptoms of post-prandial bms are common in patients with irritable bowel syndrome. Other possible causes however, include celiac disease (glute... Read More

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Testimonials
Recommendations and Thank you notes are endorsements given from patients or other doctors.

7
Recommendations
1.4K
Thank you notes
Apr 12, 2013
An excellent gastroenterologist- I would have him as my GI doctor if I have a problem involving the GI tract.
HealthTap member
Mar 30, 2015
Dr. Drewitz is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Mar 31, 2015
Dr. Drewitz is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Thank you, your answer was very helpful! I have endmtosis n had hyst 20 yrs ago n gallbladder removed 8-11-11 n now have bloody stool and bowel obstruction wjen n infection n cyst o
HealthTap member
Thanks for your quick reply! Thanks. I am v busy in my job mostly sitting upto 8 hrs a day. I v hungry at the time of dinner. Tried to loose wt. But failed. Plz advice
HealthTap member
Thanks for your quick reply! That's kind of what I was thinking too, but it's different from the usual place which is under my left breast and that hurts extremely bad!

Education & Training

Medical/Graduate school

Medical College of Wisconsin, WI
Graduated 1990MD

Residency

St. Joseph's Hospital and Medical Center Phoenix, AZ

Awards

5 time TOP DOC Award winner Phoenix Magazine
Top Doctor, Second Place, Phoenix, AZ - Winter
2013
Top Gastroenterologist , Third Place, National - Winter
2013
90,000 U.S. doctors in 147 specialties are here to answer your questions, provide medical advice, write prescriptions, and more.
Answer emailed
in 24 hours or less