Xopenex (Levalbuterol) works by relaxing the muscle in the lungs and chest and thus allow more air in, this action decreases the sensitivity of the lungs to allergens and other substances that cause inflammation.

Xopenex solution is to be inhaled using a nebulizer device. Use as prescribed by your health care preoffesional

Nausea, dry mouth or cough may occur. If these effects persist or worsen, notify your doctor promptly. To relieve dry mouth, suck on (sugarless) hard candy or ice chips, chew (sugarless) gum, drink water or use a saliva substitute.
Report promptly:
tremor,
lightheadedness,
mental/mood changes.
Unlikely but report promptly:
leg cramps,
fast/irregular heartbeat,
headache,
trouble sleeping.
Very unlikely but report promptly: fainting,
chest pain,
seizures.
In the unlikely event you have an allergic reaction to this medication, seek immediate medical attention. Symptoms of an allergic reaction include: rash, itching, swelling, dizziness, trouble breathing. If you notice other effects not listed above, contact your doctor or pharmacist.

Tell your doctor of all prescription and nonprescription medication you may use, especially of: other asthma drugs (e.g., albuterol), blood pressure or heart medications, beta-blockers (e.g., propranolol, timolol), MAO inhibitors (e.g., furazolidone, linezolid, phenelzine, selegiline, tranylcypromine, moclobemide), adrenaline-like drugs (e.g., epinephrine, ephedrine, pseudoephedrine), tricyclic antidepressants (e.g., amitriptyline, nortriptyline), thyroid drugs, ritodrine, digoxin, "water pills" (e.g., furosemide, hydrochlorothiazide). If you are currently taking an MAO inhibitor or a tricyclic antidepressant, wait at least 2 weeks between discontinuing these drugs and starting therapy with levalbuterol. Consult your doctor or pharmacist. Do not start or stop any medicine without doctor or pharmacist approval.

If overdose is suspected, contact your local poison control center or emergency room immediately

Do not share this medication with others.

If you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.

This medication is used to prevent or treat certain lung conditions.
Xopenex solution is to be inhaled using a nebulizer device.

Store vials in the foil pouch at room temperature between 59 and 77 degrees F (15 to 25 degrees C) away from light and moisture. Once the foil pouch is opened, use the vials within 2 weeks. Once vials are removed from the foil pouch, use immediately or protect from light and use within 1 week.