Hydroxyzine Injection and Zelboraf

In the database of official manuals used in the service creation an interaction registered by statistical results of studies was found, which can either lead to negative consequences for the patient health or strengthen a mutual positive effect. A doctor should be consulted to address the issue of joint drug administration.

Using vemurafenib together with hydrOXYzine can increase the risk of an irregular heart rhythm that may be serious and potentially life-threatening, although it is a relatively rare side effect. You may be more susceptible if you have a heart condition called congenital long QT syndrome, other cardiac diseases, conduction abnormalities, or electrolyte disturbances (for example, magnesium or potassium loss due to severe or prolonged diarrhea or vomiting). Talk to your doctor if you have any questions or concerns. Your doctor may already be aware of the risks, but has determined that this is the best course of treatment for you and has taken appropriate precautions and is monitoring you closely for any potential complications. You should seek immediate medical attention if you develop sudden dizziness, lightheadedness, fainting, shortness of breath, or heart palpitations during treatment with these medications, whether together or alone. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

GENERALLY AVOID: Vemurafenib can cause concentration-dependent prolongation of the QT interval. Theoretically, coadministration with other agents that can prolong the QT interval may result in additive effects and increased risk of ventricular arrhythmias including torsade de pointes and sudden death. The effect of vemurafenib 960 mg administered twice daily on QTc interval was evaluated in a multicenter, open-label, single-arm study consisting of 132 patients with BRAF V600E mutation-positive metastatic melanoma. No changes in mean QTc interval exceeding 20 ms from baseline were detected in the trial. In the first month of treatment, the largest mean increase from baseline was 12.8 ms, observed at 2 hours postdose on Day 15. In the first 6 months of treatment, the largest mean increase from baseline was 15.1 ms, which was detected at a predose time point. In general, the risk of an individual agent or a combination of agents causing ventricular arrhythmia in association with QT prolongation is largely unpredictable but may be increased by certain underlying risk factors such as congenital long QT syndrome, cardiac disease, and electrolyte disturbances (e.g., hypokalemia, hypomagnesemia, hypocalcemia). Moreover, the extent of drug-induced QT prolongation is dependent on the particular drug(s) involved and dosage(s) of the drug(s).

MANAGEMENT: Coadministration of vemurafenib with other drugs that can prolong the QT interval is not recommended. ECG and serum electrolytes, including potassium, magnesium and calcium, should be monitored before starting vemurafenib therapy and after dose modification. An ECG should also be obtained 15 days after treatment initiation, monthly during the first 3 months of treatment, and every 3 months thereafter (or more often as clinically indicated). Vemurafenib should not be started in the presence of uncorrected electrolyte abnormalities or a baseline QTc greater than 500 ms. Likewise, treatment should be interrupted if QTc exceeds 500 ms. Any electrolyte abnormalities must then be corrected and cardiac risk factors for QT prolongation (e.g., congestive heart failure, bradyarrhythmias) under control prior to resuming treatment. Vemurafenib may be restarted once QTc decreases below 500 ms, but at a reduced dosage as described in the product labeling. Permanent discontinuation of treatment is recommended if, after correction of associated risk factors, both the QTc is greater than 500 ms and the QTc increase is greater than 60 ms from pretreatment values. Patients should be advised to seek prompt medical attention if they experience symptoms that could indicate the occurrence of torsade de pointes such as dizziness, lightheadedness, fainting, palpitation, irregular heart rhythm, shortness of breath, or syncope.

Hydroxyzine Injection

Generic Name: hydroxyzine

Brand name: ANX, Vistaril, Atarax, Vistaril IM, Hyzine, Vistaject-50, Rezine

Synonyms: Hydroxyzine, HydrOXYzine

What is Hydroxyzine Injection?

Zelboraf

Generic Name: vemurafenib

Brand name: Zelboraf

Synonyms: n.a.

What is Zelboraf?