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What happens if I miss a dose (Doans PM)?

Since this medication is usually taken only at bedtime as needed, you are not likely to be on a daily dosing schedule. If you miss a dose or forget to take your medicine, wait until you are ready for sleep to take the medication. Do not take extra medicine to make up the missed dose.

What happens if I overdose (Doans PM)?

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

Overdose symptoms may include stomach pain, diarrhea, blood in your urine, thirst, headache, buzzing in your ears, gasping for breath, confusion, hallucinations, blurred vision, or seizure (convulsions).

What should I avoid while taking diphenhydramine and magnesium salicylate (Doans PM)?

Avoid drinking alcohol while you are taking diphenhydramine and magnesium salicylate. Alcohol may increase your risk of stomach bleeding.

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.

Do not use an over-the-counter cough, cold, allergy, or sleep medication without first asking your doctor or pharmacist. Diphenhydramine is contained in many medicines available over the counter. If you take certain products together you may accidentally take too diphenhydramine. Read the label of any other medicine you are using to see if it contains diphenhydramine or another antihistamine.

What other drugs will affect diphenhydramine and magnesium salicylate (Doans PM)?

Before using this medication, tell your doctor if you regularly use other medicines that make you sleepy (such as cold or allergy medicine, narcotic pain medicine, sleeping pills, muscle relaxers, and medicine for seizures, depression, or anxiety). They can add to sleepiness caused by diphenhydramine and magnesium salicylate.

Many drugs can interact with diphenhydramine and magnesium. Below is just a partial list. Tell your doctor if you are using:

• methotrexate (Rheumatrex, Trexall);
• antacids, or sodium bicarbonate (including baking soda);
• a blood thinner such as warfarin (Coumadin);
• gout medication such as probenecid (Benemid) or sulfinpyrazone (Anturane);
• medication used to prevent blood clots, such as alteplase (Activase), clopidogrel (Plavix), dipyridamole (Persantine), urokinase (Abbokinase), and others.
• pain medications such as acetaminophen (Tylenol), ibuprofen (Motrin, Advil), naproxen (Aleve, Naprosyn), diclofenac (Cataflam, Voltaren), etodolac (Lodine), indomethacin (Indocin), and others;
• seizure medication such as phenytoin (Dilantin) or valproic acid (Depakene);
• insulin or diabetes medications you take by mouth; or
• an antibiotic such as ciprofloxacin (Cipro), enoxacin (Penetrex), itraconazole (Sporanox), ketoconazole (Nizoral), norfloxacin (Noroxin), ofloxacin (Floxin), plicamycin (Mithracin), tetracycline (Ala-Tet, Sumycin), or vancomycin (Vancocin);

Where can I get more information?

Your pharmacist can provide more information about diphenhydramine and magnesium salicylate.

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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