Ephedra is commonly combined with which substance to stimulate the sympathetic nervous system?

Ephedra is commonly combined with aspirin to stimulate the sympathetic nervous system. This combination is often used because aspirin can enhance the effects of ephedra, which contains active compounds that promote increased energy expenditure and fat oxidation.

When ephedra is taken, it provides a stimulant effect primarily through its active ingredient, ephedrine. This leads to the release of norepinephrine, a neurotransmitter that activates the sympathetic nervous system, resulting in increased heart rate, blood pressure, and metabolic rate. When paired with aspirin, there is a potential for a synergistic effect that can further elevate the body's metabolic response, making this combination popular among individuals seeking weight loss and enhanced physical performance.

In contrast, the other options do not have the same synergistic effect with ephedra. Alcohol can impair metabolic function and overall energy levels, green tea extract, while sometimes combined with other supplements for health benefits, does not specifically enhance the effects of ephedra in the same way aspirin does, and flaxseed oil is primarily a source of healthy fats with no direct stimulating effects on the sympathetic nervous system. Therefore, the combination of ephedra and aspirin is notable for its intended stimulant properties.