pseudoephedrin

Pseudoephedrine is a sympathomimetic drug of the phenethylamine and amphetamine chemical classes. It is a stimulant and a decongestant, used to relieve nasal congestion caused by colds, allergies, or other conditions. It works by narrowing blood vessels in the nasal passages, which reduces swelling and mucus production. Pseudoephedrine is available over-the-counter in some countries, but in others, it is a prescription-only medication due to its potential for misuse.

The drug is often found in combination cold and allergy medications, alongside other active ingredients like antihistamines or pain relievers. It is typically administered orally in tablet or liquid form. Due to its stimulant properties, pseudoephedrine can cause side effects such as nervousness, dizziness, insomnia, and increased heart rate. Individuals with certain medical conditions, such as high blood pressure or heart disease, should use pseudoephedrine with caution or avoid it altogether.

Pseudoephedrine can be a precursor in the illicit manufacture of methamphetamine. This has led to regulations in many countries, including restrictions on the amount that can be purchased at one time and requiring identification for purchase. These measures aim to curb illegal drug production while still allowing access for legitimate medical use. Alternative decongestants like phenylephrine are sometimes used in products where pseudoephedrine is restricted, though its effectiveness is debated.