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hyoscyamine, methenamine, methylene blue, and phenyl salicylate (cont.)

What should I discuss with my healthcare provider before taking this medication?

You should not use this medicine if you are allergic to hyoscyamine, methenamine, methylene blue, or phenyl salicylate.

To make sure this medicine is safe for you, tell your doctor if you have:

  • heart disease;
  • a heart rhythm disorder;
  • congestive heart failure;
  • coronary heart disease;
  • a heart valve disorder;
  • glaucoma;
  • an enlarged prostate or bladder obstruction;
  • myasthenia gravis;
  • an ulcer or obstruction in your stomach; or
  • if you are allergic to belladonna (Donnatal and others).

FDA pregnancy category C. It is not known whether this medication will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while using this medication.

Hyoscyamine, methenamine, methylene blue, and phenyl salicylate can pass into breast milk and may harm a nursing baby. Tell your doctor if you are breast-feeding a baby.

This medicine should not be given to a child younger than 7 years old.

Older adults may be more likely to have side effects from this medication.

How should I take this medication?

Hyoscyamine, methenamine, methylene blue, and phenyl salicylate is usually taken 4 times daily. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.

Do not crush, chew, or break an enteric coated pill. Swallow it whole. The pill has a special coating to protect your stomach. Breaking the pill will damage this coating.

Drink plenty of liquids while you are taking this medication.

If you have an eye exam and your pupils are dilated with eye drops, tell the eye doctor ahead of time that you are using hyoscyamine, methenamine, methylene blue, and phenyl salicylate.

Store at room temperature away from moisture, heat, and light.

Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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