What serious risk is associated with the use of ephedra?

The use of ephedra, which is a stimulant derived from the Ephedra sinica plant, is primarily associated with an increased risk of hypertension. Ephedra has a pharmacological profile that can lead to the stimulation of the central nervous system and an increase in heart rate and blood pressure. This can result in a significant rise in blood pressure levels, thereby posing a serious risk to individuals, especially those with pre-existing cardiovascular conditions or hypertension.

Hypertension can lead to a range of complications, including heart attack, stroke, and other serious cardiovascular issues, which is why the concerns surrounding ephedra have led to regulatory actions and bans in some places. In contrast, the other options listed, such as weight gain, low blood sugar, and increased energy, are not direct, serious risks associated with the use of ephedra. While ephedra is often marketed for weight loss and energy enhancement, the primary health concern revolves around the potential for elevated blood pressure and related cardiovascular risks.