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Known interactions between the following drugs: 4-Way Fast Acting, Amitriptyline

1 interaction was found for the drugs you selected.

PHENYLEPHRINE in 4-Way Fast Acting may interact with AMITRIPTYLINE in Amitriptyline
Catecholamines are referred to as "neurotransmitters"--chemicals produced by the body that carry messages to nerve cells located throughout the body. There are several different types of catecholamines and each has a specific effect, such as causing blood pressure to increase or making the heart beat faster. Phenylephrine mimics the effect of the catecholamines and is often used to increase blood pressure that has become dangerously low. Amitriptyline enhances the effects of certain catecholamines in the brain. When these drugs are used at the same time, you may be more likely to experience a change in blood pressure or an abnormal heart rhythm. If these drugs must be used together, your doctor may want to monitor your blood pressure and heart rate more frequently and adjust the dose of phenylephrine if needed. Phenylephrine is also an ingredient that is commonly contained in over-the-counter nasal decongestants and other products used to relieve cold and flu symptoms. To avoid potential problems, ask your doctor or pharmacist before using any over-the-counter drugs--including herbal supplements--while you are taking amitriptyline. Discuss this potential interaction with your healthcare provider at your next appointment, or sooner if you think you are having problems.

This interaction is well-documented and is considered moderate in severity.


(Note: Not all drug interactions are known or reported in the literature, and new drug interactions are continually being reported. This information is provided only for your education and for you to discuss with your personal healthcare provider.)

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