Zithromax Heart Problems: FDA Updates Warnings for Z-Pak, ZMax

Harvey Kirk

By Harvey Kirk
Posted March 14, 2013


Nearly a year after a study found that side effects of Zithromax may increase the risk of heart problems, the FDA has concluded a review of the popular antibiotic, which is commonly known as Z-Pak or Zmax. Warnings will be added to the drug’s label about the risk of irregular heart rhythm problems from Zithromax, which could result in death.

The product liability lawyers at Saiontz & Kirk, P.A. have been reviewing potential Zithromax, Z-Pack or Zmax lawsuits for users who have suffered:

  • Heart Attack
  • Heart Arrythmia
  • Torsades De Pointes
  • Wrongful Death

On March 12, the FDA issued a safety communication about the potential risk of Zithromax heart problems, indicating that the agency has strengthened the warning label for Z-Pak, ZMax and other azithromycin-based antibiotics to indicate that users may face an increased risk of QT interval prolongation and torsades de pointes, a serious and potentially life-threatening heart rhythm abnormality.

The agency launched an investigation last year into Zithromax effects on the heart after a study published in the New England Journal of Medicine found that those who took Zithromax were 2.5 times more likely to die from heart problems than those who took other antibiotics or none at all.

The FDA indicates that its own investigation confirmed the findings that Zithromax appears to cause irregular heart rhythms. The agency also found that certain patients may be more at risk than others, including those who already suffer from heart problems like QT interval prolongation and who use drugs to treat abnormal heart rhythms. The FDA also included those with low blood levels of potassium and magnesium and with naturally slow heart rates on the list of those who should steer clear of Zithromax, Z-Pak and Zmax.

Zithromax Class Action Lawyers

The lawyers at Saiontz & Kirk, P.A. are reviewing potential Zithromax class action lawsuits, individual injury claims and wrongful death lawsuits against the antibiotic maker for failing to adequately warn consumers or the medical community about the heart risks with Zithromax, Z-Pak and ZMax.

All cases are being pursued on a contingency fee basis, which means there are no out-of-pocket costs to hire our law firm and we receive no attorney fees unless there is a recovery obtained by our client.

If you, a friend or family member suffered abnormal heart rhythm problems from Zithromax or died after using the antibiotic, request a free consultation and claim evaluation.

4 Comments • Add Your Comments

  • stacey says:

    My 11 year old son took Z-Pak had a reaction after taking it.

    Posted on January 12, 2014 at 1:18 am

  • chad says:

    My mother passed away from sudden heart failure while on her third day of this medication.

    Posted on April 14, 2014 at 3:39 pm

  • tracey says:

    my mom took this medication on wed june 25, 2014 and passed away the same day

    Posted on June 28, 2014 at 9:58 pm

  • LaToya says:

    I took z max And now have health problems with bradycardia.

    Posted on September 10, 2014 at 4:32 am

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