Allopurinol is a xanthine oxidase inhibitor. It works by decreasing blood uric acid, which is the chemical that causes gout.

ALLOPURINOL reduces the amount of uric acid the body makes. It is used to treat the symptoms of gout. It is also used to treat or prevent high uric acid levels that occur as a result of certain types of chemotherapy. This medicine may also help patients who frequently have kidney stones.

•  Ankle, knee, or great toe joint pain
•  joint stiffness or swelling
•  rash
•  rash with flat lesions or small raised lesions on the skin
•  Few of rare side effects are as under:
•  Agitation
•  ammonia-like breath odor
•  anxiety
•  bleeding gums
•  blistering, peeling, or loosening of the skin
•  bloody nose
•  bloody or black, tarry stools
•  blue or pale skin, change in skin colour
•  bruising
•  chest pain or discomfort

• When you first start taking this medicine, you might have more gout attacks. Do not stop Allopurinol on having an acute attack of gout as that could make an attack worse.
• Your doctor may check your liver function before starting treatment and regularly thereafter. Inform your doctor if you notice yellowing of eyes or skin, dark urine, or stomach pain.
• Do not consume alcohol while taking this medicine as it may cause your gout to flare up.
• This medicine may cause some people to become drowsy or less alert than they are normally.