If you are a tobacco smoker, use of Acetaminophen can increase the risk of liver side effects. Immediately tell your doctor if you get severe abdominal pain, nausea, vomiting, or yellowing of the skin. Do not exceed 4 g acetaminophen/day in adults.
Captive iguanas often live to be 10-12 years old. There are reports of them having lived past 20 years in captivity. Only about a third of the iguanas sold in pet stores survive to maturity because of importation stress, improper diet, temperature and sunlight. In the wild, the number is even lower because the babies are finger-food for a number of jungle predators.
Iguanas just-out-of-the-egg are about 2.5-4.5 inches long. They grow rather slowly until they are eight or nine months old. After that, they grow much faster-if they are well cared for. By the time they are two years old, they can be 2-3 feet long. And by the time they are 3-4 yrs, they can be near their maximum size.