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What happens if I miss a dose?

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?

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, extreme drowsiness, confusion, hallucinations, uneven heart rate, fainting, or seizure (convulsions).

What should I avoid while taking chlorpheniramine, methscopolamine, and phenylephrine?

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.

Avoid becoming overheated or dehydrated during exercise and in hot weather.

Cold or allergy medicine, narcotic pain medicine, sleeping pills, muscle relaxers, and medicine for seizures, depression or anxiety can add to sleepiness caused by chlorpheniramine or methscopolamine. Tell your doctor if you need to use any of these other medicines.

Avoid taking diet pills, caffeine pills, or other stimulants (such as ADHD medications) without your doctor's advice.

Do not use any other over-the-counter cold, cough, or allergy medication without first asking your doctor or pharmacist. Chlorpheniramine and phenylephrine are contained in many medicines available over the counter. If you take certain products together you may accidentally take too much of a certain drug. Read the label of any other medicine you are using to see if it contains chlorpheniramine or phenylephrine.

Avoid drinking alcohol. It can add to drowsiness caused by an antihistamine.

What other drugs will affect chlorpheniramine, methscopolamine, and phenylephrine?

Before taking this medication, tell your doctor if you are using any other antihistamine or decongestant pills, liquids, or nasal sprays. Also tell your doctor if you are using any of the following drugs:

• pramlintide (Symlin);
• aspirin or salicylates (such as Disalcid, Doan's Pills, Dolobid, Salflex, Tricosal, and others);
• an antidepressant such as amitriptyline (Elavil, Etrafon) or desipramine (Norpramin);
• bladder or urinary medications such as oxybutynin (Ditropan, Oxytrol) or tolterodine (Detrol);
• a diuretic (water pill), or medicines to treat high blood pressure, angina (chest pain), or other heart conditions;
• medication to treat irritable bowel syndrome;
• medicines to treat psychiatric disorders, such as chlorpromazine (Thorazine), risperidone (Risperdal), trazodone (Desyrel);
• migraine headache medication such as sumatriptan (Imitrex), naratriptan (Amerge), zolmitriptan (Zomig), ergotamine (Ergostat, Ergomar); or
• seizure medication such as carbamazepine (Carbatrol) or phenobarbital (Luminal, Solfoton).

This list is not complete and there may be other drugs that can interact with chlorpheniramine, methscopolamine, and phenylephrine. 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 chlorpheniramine, methscopolamine, and phenylephrine.

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.

Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

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