Cannabis oil vape pens can be safe when used properly, but there are important considerations to keep in mind. The safety of these products depends on various factors including the quality of the oil, the materials used in the vape pen, and how it's used.

Cannabis oil is often extracted from the cannabis plant and then mixed with terpenes (aromatic compounds) to enhance flavor and effects. While vaping is a popular method of cannabis consumption, the Centers for Disease Control and Prevention (CDC) and the US Food and Drug Administration (FDA) have issued warnings about potential health risks associated with vaping, especially when using unregulated or poorly manufactured products.

The concern with vaping THC and cannabis oils is the risk of harmful additives, contaminants, and low-quality products, some of which may have been linked to serious lung injuries (e.g., EVALI – e-cigarette or vaping-associated lung injury). Unregulated products can contain substances like vitamin E acetate, which is harmful when inhaled.

To ensure safety when using cannabis vape pens, it’s important to:

1. **Buy from reputable sources**: Ensure that the products are tested for quality and safety by third-party labs.
2. **Avoid products with additives**: Stick to pure cannabis oils and avoid pens that use harmful additives.
3. **Be aware of local regulations**: Ensure the products you're using are legal and compliant with local regulations.

While cannabis oil vape pens can be enjoyed safely, it's crucial to stay informed about risks and take precautions to reduce potential harm.