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

What should I discuss with my healthcare provider before taking hyoscyamine, methenamine, methylene blue, and phenyl salicylate?

You should not use hyoscyamine, methenamine, methylene blue, and phenyl salicylate if you are allergic to it.

To make sure you can safely take this medication, tell your doctor if you have any of these other conditions:

  • 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. Do not use this medication without telling your doctor if you are breast-feeding a baby.

Hyoscyamine, methenamine, methylene blue, and phenyl salicylate 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 hyoscyamine, methenamine, methylene blue, and phenyl salicylate?

Take exactly as prescribed by your doctor. Do not take in larger or smaller amounts or for longer than recommended. Follow the directions on your prescription label.

Hyoscyamine, methenamine, methylene blue, and phenyl salicylate is usually taken 4 times daily. Follow your doctor's instructions.

Do not crush, chew, or break an enteric coated pill. Swallow it whole. The enteric coated 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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