Basic Information
- Habit forming? No
- Prescription needed? Yes
- Available as generic? No
- Drug class: Analgesic (urinary), antispasmodic, anti-infective
(urinary)
Uses
A combination medicine to control infection, spasms and pain
caused by urinary tract infections.
Dosage & Usage Information
How to take:
Tablet--Swallow with liquid or food to lessen stomach irritation.
When to take:
30 minutes before meals (unless directed otherwise by doctor).
If you forget a dose:
Take as soon as you remember up to 2 hours late. If more than
2 hours, wait for next scheduled dose (don't double this dose).
What drug does:
Makes urine acid. Blocks nerve impulses at parasympathetic
nerve endings, preventing muscle contractions and gland secretions
of organs involved. Methenamine destroys some germs.
Time lapse before drug works:
15 to 30 minutes.
Don't take with:
Any other medicine without consulting your doctor or pharmacist.
Overdose
SYMPTOMS:
Dilated pupils, rapid pulse and breathing, dizziness, fever,
hallucinations, confusion, slurred speech, agitation, flushed
face, convulsions, coma.
WHAT TO DO:
- Dial 911 (emergency) or O (operator) for an ambulance
or medical help. Then give first aid immediately.
- See EMERGENCY Information.
Possible Adverse Reactions or Side Effects
Life-threatening:
Heartbeat irregularity, Seek emergency shortness of breath
or treatment immediately. difficulty breathing.
Common:
Dry mouth, throat, ears, nose.
Infrequent:
- Flushed, red face; drowsiness; difficult urination; nausea
and vomiting; abdominal pain; ringing or buzzing in ears;
severe drowsiness; back pain; lightheadedness.
- Headache, nasal congestion, altered taste.
Rare:
Blurred vision; pain in eyes; skin rash, hives.
Warnings & Precautions
Don't take if:
- You are allergic to any of the ingredients or aspirin.
- Brain damage in child.
- You have glaucoma.
Before you start, consult your doctor:
- If you are on any special diet such as low-sodium.
- If you have had a hiatal hernia, bronchitis, asthma, liver
disease, stomach or duodenal ulcers.
- If you have asthma, nasal polyps, bleeding disorder or
enlarged prostate.
- If you will have any surgery within 2 months.
- If you have heart disease.
Over age 60:
- Adverse reactions and side effects may be more frequent
and severe than in younger persons.
- More likely to cause hidden bleeding in stomach or intestines.
Watch for dark stools.
Pregnancy:
Risk to unborn child outweighs benefits. Don't use.
Breast-feeding:
Drug passes into milk. Avoid or discontinue nursing until
you finish medicine.
Infants & children:
Side effects more likely. Not recommended in children under
12.
Prolonged use:
May lead to constipation or kidney damage. Request lab studies
to monitor effects of prolonged use.
Skin & sunlight:
No problems expected.
Driving, piloting or hazardous work:
May disqualify for piloting aircraft during time you take
medicine.
Discontinuing:
May be unnecessary to finish medicine. Follow your symptoms
and doctor's advice.
Others:
- Salicylates can complicate surgery, pregnancy, labor and
delivery, and illness.
- Urine tests for blood sugar may be inaccurate.
- Drink cranberry juice or eat prunes or plums to help make
urine more acid.
Possible Interaction with Other Drugs
