hi this is from site and this is the link to it <link> for more help just google the link to the www. to open and read. isoniazid may cause severe and sometimes fatal liver problems (eg hepatitis). the risk of liver problems is greater in patients older than 35 years old. it may also be increased by daily use of alcohol long-term liver problems or unsanitary injectable drug use. women especially those who are black are hispanic or have just had a baby may also be at increased risk. hepatitis can develop at any time during treatment but usually occurs during the first 3 months. your doctor will monitor your liver function and discuss your progress every month. contact your doctor right away if you develop unusual fatigue weakness or fever that lasts longer than 3 days general feeling of discomfort loss of appetite nausea vomiting numbness or tingling of the hands or feet dark urine yellowing of the skin or eyes or stomach pain or tenderness. your doctor may decide to slowly restart isoniazid after these symptoms disappear and lab tests return to normal. patients with active liver problems should not use isoniazid. your find lots more info on site this does not seem a very nice drug to be taken. good luck
does isoniazid affect the good bacteria in digestive system. what are some side effects?