Final answer:
A nurse would suspect amphetamine use if they observed signs of euphoria in a client. Amphetamines are stimulants that can also cause increased blood pressure and heart rate, along with other physiological changes.
Step-by-step explanation:
A nurse would suspect that a client is taking amphetamines if they observed signs of euphoria. Amphetamines are central nervous system stimulants that can cause a variety of physiological effects. These include an increase in energy levels, heightened alertness, decreased need for sleep, and feelings of euphoria, which is a state of intense happiness and excitement. Other common signs of amphetamine use may include increased blood pressure, increased heart rate, dilated pupils, and at times, behaviors like increased talkativeness or agitation. It's important to note that the use of amphetamines can also lead to negative effects on mental health, such as anxiety or paranoia, and can lead to chemical dependence.