Allopurinol TabletsN

I have been prescribed zyloric 100 mg for kidney stone
side effects and efficacy need to be known

Side-effects of Zyloric (Allopurinol) are rare, though significant when they occur. A small percentage of people develop a rash and must discontinue this drug. The most serious adverse effect is a hypersensitivity syndrome consisting of fever, skin rash, eosinophilia, hepatitis, worsened renal function, and, in some cases, allopurinol hypersensitivity syndrome. Allopurinol is one of the drugs commonly known to cause Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TENS), two life-threatening dermatological conditions.

Allopurinol can cause severe pancytopenia if given with azathioprine or mercaptopurine, due to inhibition of xanthine oxidase, which metabolizes these drugs.

Allopurinol can also lower blood pressure in mild hypertension. Furthermore, it is suspected to cause congenital malformations when used during pregnancy, and should be avoided whenever possible by women trying to conceive.

You can view a detailed description of the drug by clicking on the link below...
http:/­/­www.medschat.com/­wiki/­Allopurinol/­

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I want an information of drugs category brand name 'Monticope tablet.'