Final answer:
Sudafed is used as a nasal decongestant and stimulant. It can be found in over-the-counter cold and allergy medications. It is important to be aware of its potential toxic effects and to use it as directed.
Step-by-step explanation:
Sudafed, also known as pseudoephedrine, is used as a nasal decongestant and stimulant. It is found in many over-the-counter cold and allergy medications, either as a single ingredient or in combination with other drugs. However, it is important to be aware of its potential toxic effects, as it can be misused as a precursor in the illegal production of methamphetamine.
When used as directed, Sudafed can help relieve nasal and sinus congestion. However, it is important to follow the recommended dosage and avoid using it for an extended period of time, as it can cause side effects such as increased heart rate, insomnia, and dizziness.