Allanhist PDX Syrup and Amyl nitrite Inhalation, oral/nebulization

• Generic Name: brompheniramine / dextromethorphan / guaifenesin / phenylephrine
• Dosage Forms: n.a.
• Other Brand Names: AccuHist PDX Syrup, Allanhist PDX Syrup, Bromhist-PDX, EndaCof-PD, Uni-Hist PDX Syrup

Brompheniramine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose.

Dextromethorphan is a cough suppressant. It affects the signals in the brain that trigger cough reflex.

Guaifenesin is an expectorant. It helps loosen congestion in your chest and throat, making it easier to cough out through your mouth.

Phenylephrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated blood vessels can cause nasal congestion (stuffy nose).

Allanhist PDX Syrup is a combination medicine used to treat cough, runny or stuffy nose, sneezing, itching, and watery eyes caused by allergies, the common cold, or the flu.

Allanhist PDX Syrup will not treat a cough that is caused by smoking, asthma, or emphysema.

Allanhist PDX Syrup may also be used for purposes not listed in this medication guide.

• Generic Name: amyl nitrite
• Dosage Forms: n.a.
• Other Brand Names:

Amyl nitrite is related to the nitrate medicines and is used by inhalation to relieve the pain of angina attacks. It works by relaxing blood vessels and increasing the supply of blood and oxygen to the heart while reducing its workload.

Amyl nitrite may also be used for other conditions as determined by your doctor.

Amyl nitrite comes in a glass capsule covered by a protective cloth. The cloth covering allows you to crush the glass capsule between your fingers without cutting yourself.

On the street, amyl nitrite and others like it are sometimes called "poppers." They have been used by some people to cause a "high" or to improve sex. Use in this way is not recommended. Amyl nitrite can cause serious harmful effects if too much is inhaled.

Amyl nitrite is available only with your doctor's prescription.