Yes
As far as I know, it does not. Allopurinol is the generic name for Zyloprim. Here are the possible side effects for Zyloprim/allopurinol: http://www.rxlist.com/zyloprim-drug.htm
At times it can cause dizziness!
Dizziness doesn't cause vomiting. Dizziness and or vomiting are symptoms of something else occurring in your body.
Grapefruit allopurinol
At times it can cause dizziness!
Syringomyelia has been known to cause dizziness I know this because I suffer from vertigo and I have syringomyelia
Personally I have experienced anxiety and increased low stress tolerance after taking Allopurinol. My doctor said it happens to around 2% of patients. I tried to switch to Uloric but it cause an abnormal heart rythim. Currently searching for another medication to replace it.
Yes, H. Pylori can cause dizziness. It absorbs Vitamin C, which then prevents the body from absorbing Iron, which then causes anemia. Anemia can cause dizziness.
yes
Sinus infection does not cause dizziness.
The most common cause of dizziness is an inner ear infection. Other causes are fast heart rate, anxiety, dehidration or low blood sugar. Don't worry about it!