CBD and Antivirals (e.g. Tamiflu, Zovirax)

medication pills

Understanding CBD and Its Interactions with Antivirals

As the popularity of Cannabidiol (CBD) continues to rise, many people who are on antiviral medications such as Tamiflu and Zovirax are considering incorporating CBD into their health regimen. However, it's important to understand potential interactions between CBD and these medications to ensure safety and efficacy. Always consult with your healthcare provider before starting any new supplement, including CBD.

What is CBD?

CBD is one of the many compounds found in the cannabis plant. Unlike its cousin, THC, CBD is not psychoactive, meaning it doesn't cause the "high" associated with cannabis. Instead, CBD is most commonly used for its potential therapeutic benefits in managing conditions like pain, anxiety, and epilepsy.

How Does CBD Work in the Body?

CBD interacts with the body's Endocannabinoid System (ECS), which is involved in regulating a variety of functions including sleep, appetite, pain, and immune system response. CBD primarily interacts with the CB1 and CB2 receptors in the ECS, potentially influencing the body's production of natural cannabinoids and altering the receptors' ability to respond to stimuli.

What are Antivirals?

Antivirals like Tamiflu and Zovirax are medications used to treat viral infections. Tamiflu, also known as oseltamivir, is most commonly used to treat influenza in its early stages. Zovirax, or acyclovir, is used to treat infections caused by the herpes viruses, including genital herpes, cold sores, shingles, and chickenpox.

How Do Antivirals Work in the Body?

Antivirals work by inhibiting the development of the virus in the body. Tamiflu, for example, blocks the actions of influenza virus types A and B in your body. Zovirax, on the other hand, decreases the severity and length of these outbreaks by slowing the growth and spread of the herpes virus in the body.

Potential Interactions Between CBD and Antivirals

While CBD is generally considered safe, it can interact with other medications, potentially altering their effects. The potential interactions between CBD and antivirals like Tamiflu and Zovirax are not fully understood and research is ongoing. However, CBD is known to inhibit the cytochrome P450 enzyme system in the liver. This system is responsible for metabolizing potentially toxic compounds, including many medications.

By inhibiting this system, CBD can affect the way the body processes certain drugs, including antivirals. This may increase the levels of these drugs in your system, potentially leading to an increase in side effects or a decrease in the drug's effectiveness.

Consult Your Healthcare Provider

Given these potential interactions, it's crucial to consult with your healthcare provider before starting CBD if you are on antiviral medications. Your healthcare provider can help you understand the potential risks and benefits, and can monitor your response to the medication.


While CBD may offer potential health benefits, its interaction with antiviral medications like Tamiflu and Zovirax is not fully understood. CBD can affect the way the body processes these medications, potentially leading to increased side effects or decreased effectiveness. It's crucial to consult with your healthcare provider before starting CBD if you are on antiviral medications. As with any new supplement or medication, safety should always be the top priority.

Back to blog

Leave a comment

Please note, comments need to be approved before they are published.