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- $Unique_ID{BRK03224}
- $Pretitle{}
- $Title{methenamine}
- $Subject{Hiprex Merrell Dow Mandameth Major Mandelamine Parke-Davis hippurate
- mandelate Urex Riker Antibiotic methenamine bacterial infections urinary
- tract}
- $Volume{}
- $Log{
- Urex*0322401.scf}
-
- Copyright (C) 1993 Publications International, Ltd.
-
-
- methenamine
- ------------------------------------------------------------------------------
-
- BRAND NAMES (Manufacturers)
-
- Hiprex (Merrell Dow)
- Mandameth (Major)
- Mandelamine (Parke-Davis)
- methenamine hippurate (various manufacturers)
- methenamine mandelate (various manufacturers)
- Urex (Riker)
-
- TYPE OF DRUG
-
- Antibiotic
-
- INGREDIENT
-
- methenamine
-
- DOSAGE FORMS
-
- Tablets (500 mg and 1 g)
- Enteric-coated tablets (500 mg and 1 g).
- Oral suspension (250 mg and 500 mg per 5-ml spoonful)
- Oral granules (1 g packets)
-
- STORAGE
-
- Methenamine tablets, oral suspension, and granules should be stored at
- room temperature in tightly closed containers. This medication should never
- be frozen.
-
- USES
-
- Methenamine is used to prevent and treat bacterial infections of the
- urinary tract.
-
- TREATMENT
-
- In order to avoid stomach irritation, you should take methenamine with
- food or with a full glass of water or milk (unless your doctor directs you to
- do otherwise).
- The oral suspension form of this medication should be shaken well just
- before measuring each dose. The contents tend to settle on the bottom of the
- bottle, so it is necessary to shake the container to distribute the
- ingredients evenly and equalize the doses. Each dose should then be measured
- carefully with a specially designed 5-ml measuring spoon. An ordinary kitchen
- teaspoon is not accurate enough.
- The enteric-coated tablets should be swallowed whole. Breaking,
- crushing, or chewing these tablets increases their gastrointestinal side
- effects.
- If you are taking the oral granules, the contents of the packet should be
- dissolved in two to four ounces of water just before you take the dose.
- Try not to miss any doses of this medication. If you do miss a dose,
- take it immediately. However, if you do not remember to take the missed dose
- until it is almost time for your next dose, take the missed dose immediately;
- space the following dose about halfway through the regular interval between
- doses; and then continue with your regular dosing schedule.
- It is important to continue to take this medication for the entire time
- prescribed by your doctor (usually seven to 14 days), even if the symptoms
- disappear before the end of that period. If you stop taking the drug too
- soon, resistant bacteria are given a chance to continue growing, and the
- infection could recur.
- This medication works best when your urine is acidic (ph 5.5 or below).
- You may want to talk to your doctor about testing the acidity of your urine
- before you begin treatment with methenamine.
-
- SIDE EFFECTS
-
- Minor.
-
- Abdominal cramps, diarrhea, headache, loss of appetite, nausea, or
- vomiting. These side effects should disappear as your body adjusts to the
- medication.
-
- Major.
-
- Tell your doctor about any side effects that are persistent or
- particularly bothersome. IT IS ESPECIALLY IMPORTANT TO TELL YOUR DOCTOR about
- difficulty in breathing, difficult or painful urination, itching, mouth sores,
- rapid weight gain (three to five pounds within a week), shortness of breath,
- or skin rash.
-
- INTERACTIONS
-
- Methenamine interacts with several other types of medications:
- 1. Sodium bicarbonate, antacids, acetazolamide, and diuretics (water
- pills) can decrease the effectiveness of methenamine by preventing its
- conversion to formaldehyde.
- 2. Methenamine can increase the side effects (to the kidneys) of
- sulfonamide antibiotics.
- Before starting to take methenamine, BE SURE TO TELL YOUR DOCTOR about
- any medications you are currently taking, especially any of those listed
- above.
-
- WARNINGS
-
- * Tell your doctor about unusual or allergic reactions you have had to
- any medications, especially to methenamine.
- * Before starting to take methenamine, be sure to tell your doctor if you
- now have or if you have ever had dehydration, kidney disease, or liver
- disease.
- * Some of these products contain the color additive FD&C Yellow No. 5
- (tartrazine), which can cause allergic-type reactions (fainting, rash,
- shortness of breath) in certain susceptible individuals.
- * This medication has been prescribed for your current infection only.
- Another infection later on, or one that someone else has, may require a
- different medicine. You should not give your medicine to other people or use
- it for other infections, unless your doctor specifically directs you to do so.
- * If the symptoms of your infection do not improve in several days,
- CONTACT YOUR DOCTOR.
- * In order for this medication to work properly, it is necessary that
- your urine remain acidic. You should, therefore, avoid foods that cause the
- urine to become alkaline such as milk products. Your doctor may also want you
- to take vitamin C to help keep the urine acidic.
- * Be sure to tell your doctor if you are pregnant. Although methenamine
- appears to be safe during pregnancy, it does cross the placenta, and extensive
- studies have not been conducted. Also, tell your doctor if you are
- breast-feeding an infant. Small amounts of methenamine pass into breast milk.
-
- ----------------
-
- The material contained here is "FOR INFORMATION ONLY" and should not replace
- the counsel and advice of your personal physician. Promptly consulting your
- doctor is the best path to a quick and successful resolution of any medical
- problem.
-