1. The Common Cold Slideshow Pictures
2. Slideshow: Treating Your Child's Cold or Fever
3. Take the Cold & Flu Quiz

What happens if I miss a dose (A-Tan 12X, Ryna-12X)?

Since cough or cold medicine is usually taken only as needed, you may not be on a dosing schedule. If you are taking the medication regularly, take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at your next regularly scheduled time. Do not take extra medicine to make up the missed dose.

What happens if I overdose (A-Tan 12X, Ryna-12X)?

Seek emergency medical attention if you think you have used too much of this medicine.

Overdose symptoms may include feeling restless or nervous, nausea, vomiting, stomach pain, dizziness, drowsiness, dry mouth, warmth or tingly feeling, or seizure (convulsions).

What should I avoid while taking guaifenesin, phenylephrine, and pyrilamine (A-Tan 12X, Ryna-12X)?

This medication can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.

Tell your doctor if you regularly use other medicines that make you sleepy (such as pain medication, sleeping pills, muscle relaxers, and medicine for seizures, depression or anxiety). They can add to sleepiness caused by pyrilamine.

Avoid drinking alcohol while you are taking this medication. Alcohol can add to drowsiness caused by an antihistamine.

Avoid taking diet pills, caffeine pills, or other stimulants (such as ADHD medications) without your doctor's advice. Taking a stimulant together with a decongestant can increase your risk of unpleasant side effects.

Do not use any other over-the-counter cough, cold, allergy, or sleep medication without first asking your doctor or pharmacist. If you take certain products together you may accidentally take too much of one or more types of medicine. Read the label of any other medicine you are using to see if it contains guaifenesin, phenylephrine, or pyrilamine.

What other drugs will affect guaifenesin, phenylephrine, and pyrilamine (A-Tan 12X, Ryna-12X)?

Before taking this medication, tell your doctor if you are using any of the following drugs:

• an antidepressant;
• a diuretic (water pill);
• medicines to treat high blood pressure;
• medication to treat irritable bowel syndrome;
• seizure medication;
• bladder or urinary medications such as oxybutynin (Ditropan, Oxytrol) or tolterodine (Detrol);
• aspirin or salicylates (such as Disalcid, Doan's Pills, Dolobid, Salflex, Tricosal, and others);
• a beta-blocker such as atenolol (Tenormin), carteolol (Cartrol), metoprolol (Lopressor, Toprol), nadolol (Corgard), propranolol (Inderal), sotalol (Betapace), timolol (Blocadren), and others; or
• antidepressants such as amitriptyline (Elavil), clomipramine (Anafranil), imipramine (Janimine, Tofranil), and others.

This list is not complete and there may be other drugs that can interact with guaifenesin, phenylephrine, and pyrilamine. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.

Where can I get more information?

Your pharmacist can provide more information about guaifenesin, phenylephrine, and pyrilamine.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

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