smoking two cigarettes at once Cigars... the Same Time Photograph of two men smoking

Robert Jackler, a Stanford doctor and tobacco marketing expert, calls them, "non-menthol wink, wink menthol," meaning that the confusing similarities between menthol and their new substitutes are intentional

It may be used in enclosed indoor spaces where odor treatment is appropriate, provided the area is unoccupied during operation and properly ventilated afterward

But higher doses can increase potentially serious side effects such as low blood pressure and depressed heart function

Additionally, the retrospective nature of some of the data, particularly regarding smoking history and dependence levels, may have led to recall bias, where participants may have inaccurately remembered or reported their past behaviors