Skip to Content

Darpaz Side Effects

Generic Name: hyoscyamine / methenamine / methylene blue / phenyl salicylate

Note: This page contains information about the side effects of hyoscyamine / methenamine / methylene blue / phenyl salicylate. Some of the dosage forms included on this document may not apply to the brand name Darpaz.

Applies to hyoscyamine / methenamine / methylene blue / phenyl salicylate: oral tablet, oral tablet enteric coated

In addition to its needed effects, some unwanted effects may be caused by hyoscyamine / methenamine / methylene blue / phenyl salicylate. In the event that any of these side effects do occur, they may require medical attention.

Severity: Moderate

If any of the following side effects occur while taking hyoscyamine / methenamine / methylene blue / phenyl salicylate, check with your doctor or nurse as soon as possible:

Less common or rare:
  • Blurred vision
  • eye pain
  • skin rash or hives
Symptoms of overdose:
  • Blood in urine and/or stools
  • diarrhea
  • dizziness
  • drowsiness (severe)
  • fast heartbeat
  • flushing or redness of face
  • headache (severe or continuing)
  • lower back pain
  • pain or burning while urinating
  • ringing or buzzing in the ears
  • shortness of breath or troubled breathing
  • sweating
  • unusual tiredness or weakness

Minor Side Effects

Some of the side effects that can occur with hyoscyamine / methenamine / methylene blue / phenyl salicylate may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

Less common:
  • Difficult urination (more common with large doses taken over a prolonged period of time)
  • dryness of mouth, nose, or throat
  • nausea or vomiting
  • stomach upset or pain (more common with large doses taken over a prolonged period of time)

This medicine may cause your urine and/or stools to turn blue or blue-green. This is to be expected while you are taking this medicine.

Not all side effects for Darpaz may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

More about Darpaz (hyoscyamine / methenamine / methylene blue / phenyl salicylate)

Consumer resources

Professional resources

Related treatment guides

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. 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 substances you are taking, check with your doctor, nurse, or pharmacist.

Hide