A client is hospitalized with hepatitis A. Which of the client's regular medications is contraindicated due to the current illness? A. Prilosec (omeprazole) B. Synthroid (levothyroxine) C. Premarin (conjugated estrogens) D. Lipitor (atorvastatin)

Contraindicated means that a particular drug or procedure should not be used in a specific medical condition because it could be harmful or less effective. In this case, we are looking for a medication that should not be used by the client due to their current illness, hepatitis A, as it may cause harm or be less effective.

Hepatitis A is a viral infection that causes inflammation in the liver. It can range from a mild illness to a severe one that requires hospitalization. The liver is responsible for metabolizing many medications, and some drugs can be harmful if taken when the liver is not functioning properly.

We will now research each medication to understand their mechanism of action, and their effects on the liver. A. Prilosec (omeprazole) - It is a proton pump inhibitor used to treat gastroesophageal reflux disease (GERD) and other stomach acid-related conditions. It does not have a significant impact on the liver. B. Synthroid (levothyroxine) - It is a synthetic thyroid hormone used to treat hypothyroidism (underactive thyroid). It does not affect the liver significantly. C. Premarin (conjugated estrogens) - It is a hormone replacement therapy used to treat menopause symptoms and prevent osteoporosis. Estrogens are metabolized in the liver, but they do not have a strong effect on liver function. D. Lipitor (atorvastatin) - It is a statin drug used to lower cholesterol levels. It can affect the liver, as it is primarily metabolized in the liver, and it may increase liver enzyme levels.

Based on our research, Lipitor (atorvastatin) is the medication that is contraindicated for the client with hepatitis A. This is because statin drugs are primarily metabolized in the liver, and atorvastatin may increase liver enzyme levels. In a patient with hepatitis A, taking a medication that could further affect liver function can be harmful. So, the correct answer is: D. Lipitor (atorvastatin)