Guide To Isoniazid

Potential Side Effects

The most common side effects of this medication are nausea, vomiting, and an upset stomach. It may also cause tingling or numbness in the hands and feet. Some patients will have abnormal liver function tests when they are on this drug. Thankfully, serious side effects are less common. However, they can occur. For example, individuals may notice vision changes or pain behind the eyes.

Other serious side effects include seizures, memory problems, and unusual behavior. Jaundice may occur as well, and some patients may experience bleeding gums or nosebleeds. Patients should call their doctor immediately if they have serious or persistent side effects. They should also inform them if they develop a fever that lasts more than seventy-two hours.

Precautions To Remember

Patients need to take precautions with isoniazid. This medication is not safe for use in patients with active liver disease. In addition, those with a history of hepatitis should not take it either. Patients should review their medical history with their doctor before starting this medication. Points of note include having a history of kidney disease, diabetes, HIV, nerve issues, liver disease, or malnourishment.

Their doctor will also need to know about the patient's alcohol use and if they have ever used injected drugs. Patients thirty-five or older need to have their liver enzymes checked before starting this medicine. In addition, patients must take this medication on an empty stomach. Ideally, they should take it one to two hours before a meal.