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Tiazac Warnings and Precautions

Prior to beginning treatment, it is important to understand the potential risks associated with Tiazac. Warnings and precautions include the risk of the medication causing fluid retention, which can be dangerous for people with congestive heart failure. Tiazac warnings and precautions also extend to people who have certain allergies and women who are pregnant or breastfeeding.

Tiazac: What Should I Tell My Healthcare Provider?

You should talk with your healthcare provider prior to taking Tiazac® (diltiazem hydrochloride) if you have:
Also, let your healthcare provider know if you are:
  • Pregnant or thinking of becoming pregnant
  • Breastfeeding.
Make sure to tell your healthcare provider about any other medicines you are taking, including prescription and non-prescription medicines, vitamins, and herbal supplements.

Specific Tiazac Warnings and Precautions

Warnings and precautions to be aware of prior to using Tiazac include the following:
  • The medication can slow down the heart rate. This can be a problem in people who have certain types of arrhythmias or people who are taking other medications that slow down the heart rate.
  • Tiazac should be used with caution in people who have congestive heart failure (CHF). It can cause fluid retention (edema), which can be especially dangerous in people with CHF.
  • The medication can lower your blood pressure. Be sure to let your healthcare provider know if you have signs of low blood pressure, including dizziness, lightheadedness, or fainting.
  • Tiazac can increase liver enzymes (diagnosed using a blood test), which may be a sign of liver damage.
  • The medication is metabolized and removed from the body using the liver and kidneys. If you have liver or kidney disease, Tiazac may accumulate in your body. Your healthcare provider should monitor you more closely and may need to decrease your Tiazac dosage.
  • Tiazac can interact with a number of medicines (see Tiazac Drug Interactions).
  • Tiazac is considered a pregnancy Category C medication. This means that it may not be safe to use during pregnancy. Talk to your healthcare provider about the risks and benefits of using the drug while pregnant (see Tiazac and Pregnancy).
  • Tiazac does pass through breast milk. Therefore, if you are breastfeeding or plan to start, discuss this with your healthcare provider prior to using the drug (see Tiazac and Breastfeeding).
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Tiazac Drug Information

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