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What happens if I miss a dose?

Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include severe dizziness or rapid pulse.

What should I avoid while taking hyoscyamine, methenamine, methylene blue, and phenyl salicylate?

Antacids or anti-diarrhea medicine can make it harder for your body to absorb hyoscyamine. Avoid taking an antacid or anti-diarrhea medicine within 1 hour before or after you take hyoscyamine, methenamine, methylene blue, and phenyl salicylate.

If you also take ketoconazole (Nizoral), wait at least 2 hours after taking it before you take hyoscyamine, methenamine, methylene blue, and phenyl salicylate.

What other drugs will affect hyoscyamine, methenamine, methylene blue, and phenyl salicylate?

Many drugs can interact with this medicine. Also, hyoscyamine can make it harder for your body to absorb other medications you take by mouth. Tell your doctor about all other medicines you use, especially:

• atropine (Atreza, Sal-Tropine), belladonna (Donnatal, and others), benztropine (Cogentin), dimenhydrinate (Dramamine), methscopolamine (Pamine), or scopolamine (Transderm Scop);
• a diuretic (water pill);
• bronchodilators such as ipratropium (Atrovent) or tiotropium (Spiriva);
• glycopyrrolate (Robinul);
• homatropine (Hycodan, Tussigon);
• methantheline
• neostigmine (Prostigmin) or pyridostigmine (Mestinon);
• bladder or urinary medications such as darifenacin (Enablex), flavoxate (Urispas), oxybutynin (Ditropan, Oxytrol), tolterodine (Detrol), or solifenacin (Vesicare); or
• irritable bowel medications such as dicyclomine (Bentyl), hyoscyamine (Hyomax), or propantheline (Pro-Banthine).
• an MAO inhibitor such as furazolidone (Furoxone), isocarboxazid (Marplan), phenelzine (Nardil), rasagiline (Azilect), selegiline (Eldepryl, Emsam, Zelapar), or tranylcypromine (Parnate);
• medicines to treat symptoms of Alzheimer's disease such as donepezil (Aricept), galantamine (Razadyne), memantine (Namenda), rivastigmine (Exelon), or tacrine (Cognex);
• narcotic pain medication such as codeine (Tylenol #3, Cheratuss, Guaiatuss), fentanyl (Actiq, Duragesic), hydrocodone (Lortab, Vicodin, Vicoprofen), hydromorphone (Dilaudid), methadone (Dolophine, Methadose), morphine (Avinza, Kadian, MS Contin, Oramorph), oxycodone (OxyContin, Endocet, Percocet), propoxyphene (Darvocet, Propacet), and others;
• sodium bicarbonate, potassium citrate (K-Lyte, Urocit-K), sodium citrate and citric acid (Bicitra, Oracit), or sodium citrate and potassium (Citrolith, Polycitra);
• sulfa drugs (Bactrim, Septra, Sulfatrim, SMX-TMP, and others); or
• ulcer or irritable bowel medications such as dicyclomine (Bentyl), glycopyrrolate (Robinul), hyoscyamine (Hyomax), mepenzolate (Cantil), or propantheline (Pro Banthine).

There may be other drugs that can interact with hyoscyamine, methenamine, methylene blue, and phenyl salicylate. 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 hyoscyamine, methenamine, methylene blue, and phenyl 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.

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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