While taking theophylline (Theo-24), the client should limit the intake of which substances?

The correct answer is based on the interactions between theophylline and certain substances that can affect its metabolism and effectiveness in the body. Theophylline is a bronchodilator commonly used to treat respiratory diseases such as asthma and chronic obstructive pulmonary disease (COPD). It is metabolized by the liver with the help of certain enzymes. Caffeine, found in coffee, cola, and chocolate, is chemically similar to theophylline and can enhance its effects. This may increase the risk of side effects, such as heart palpitations, insomnia, or increased heart rate, because both theophylline and caffeine are central nervous system stimulants.

Reducing or limiting the intake of these substances helps ensure the medication's therapeutic levels remain stable and reduces the likelihood of adverse effects from theophylline. Understanding these interactions is crucial for providing effective care and optimizing the medication's efficacy for clients using theophylline.