Get emergency medical help if you have signs of an allergic reaction to Zyn: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
In rare cases, Zyn may cause a severe skin reaction that can be fatal if it spreads to other parts of the body. Seek medical treatment if you have a new or worsening skin rash with fever, swollen glands, flu symptoms, or severe tingling or numbness.
Call your doctor at once if you have:
severe stomach pain, diarrhea that is watery or bloody;
headache with chest pain and severe dizziness, fainting, fast or pounding heartbeats;
liver problems - nausea, upper stomach pain, itching, tired feeling, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes); or
severe skin reaction - fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.
Older adults may be more likely to have side effects on heart rhythm, including a life-threatening fast heart rate.
Common Zyn side effects may include:
nausea, vomiting, stomach pain; or
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
Side effects of Zyn in details
A side effect of any drug can be defined as the unwanted or undesired effect produced by the drug. The side effect can be major or in few medications minor that can be ignored. Side effects not only vary from drug to drug, but it also depends on the dose of the drug, the individual sensitivity of the person, brand or company which manufactures it. If side effects overweigh the actual effect of the medicine, it may be difficult to convince the patient to take the drug. Few patients get specific side effects to specific drugs; in that case, a doctor replaces the drug with another. If you feel any side effect and it troubles you, do not forget to share with your healthcare practitioner.
Clinical Trials Experience
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.
The data described below reflect exposure to Zyn in 728 adult patients. All patients received a single 2 g oral dose of Zyn. The population studied had community-acquired pneumonia and acute bacterial sinusitis.
In controlled clinical trials with Zyn, the majority of the reported treatment-related adverse reactions were gastrointestinal in nature and mild to moderate in severity.
Overall, the most common treatment-related adverse reactions in adult patients receiving a single 2 g dose of Zyn were diarrhea/loose stools (12%), nausea (4%), abdominal pain (3%), headache (1%), and vomiting (1%). The incidence of treatment-related gastrointestinal adverse reactions was 17% for Zyn and 10% for pooled comparators.
Treatment-related adverse reactions following Zyn treatment that occurred with a frequency of <1% included the following:
The data described below reflect exposure to Zyn in 907 pediatric patients. The population was 3 months to 12 years of age. All patients received a single 60 mg/kg oral dose of Zyn.
As in adults, the most common treatment-related adverse reactions in pediatric subjects were gastrointestinal in nature. The pediatric subjects all received a single 60 mg/kg dose (equivalent to 27 mg/lb) of Zyn.
In a trial with 450 pediatric subjects (ages 3 months to 48 months), vomiting (11%), diarrhea (10%) loose stools (9%), and abdominal pain (2%) were the most frequently reported treatment-related gastrointestinal adverse reactions. Many treatment related gastrointestinal adverse reactions with an incidence greater than 1% began on the day of dosing in these subjects [43% (68/160)] and most [53% (84/160)] resolved within 48 hr of onset. Treatment-related adverse events that were not gastrointestinal, occurring with a frequency ≥ 1% were: rash (5%), anorexia (2%), fever (2%), and dermatitis (2%).
In a second trial of 337 pediatric subjects, ages 2 years to 12 years, the most frequently reported treatment-related adverse reactions also included vomiting (14%), diarrhea (7%), loose stools (2%), nausea (4%) and abdominal pain (4%).
A third trial investigated the tolerability of two different concentrations of Zyn oral suspension in 120 pediatric subjects (ages 3 months to 48 months), all of whom were treated with Zyn. The study evaluated the hypothesis that a more dilute, less viscous formulation (the recommended 27 mg/mL concentration of Zyn) is less likely to induce vomiting in young children than a more concentrated suspension used in other pediatric studies. The vomiting rate for subjects taking the dilute concentration Zyn was 3% (2/61). The rate was numerically lower but not statistically different from the vomiting for the more concentrated suspension Across both treatment arms, the only treatment-related adverse events with a frequency of ≥ 1% were vomiting (6%, 7/120) and diarrhea (2%, 2/120).
Treatment-related adverse reactions with a frequency of < 1% following Zyn treatment in all 907 pediatric subjects in the Phase 3 studies were:
Body as a whole: Chills, fever, flu syndrome, headache;
Skin/appendages: Pruritus, rash, photosensitivity, serious skin reactions including erythema multiforme, Stevens-Johnson syndrome, toxic epidermal necrolysis, and DRESS.
Special senses: Hearing disturbances including hearing loss, deafness and/or tinnitus and reports of taste/smell perversion and/or loss
In subjects with normal baseline values, the following clinically significant laboratory abnormalities (irrespective of drug relationship) were reported in Zyn clinical trials in adults and pediatric patients:
Laboratory abnormalities with an incidence of greater than or equal to 1%: reduced lymphocytes and increased eosinophils; reduced bicarbonate. Laboratory abnormalities with an incidence of less than 1%: leukopenia, neutropenia, elevated bilirubin, AST, ALT, BUN, creatinine, alterations in potassium. Where follow-up was provided, changes in laboratory tests appeared to be reversible.
Laboratory abnormalities with an incidence of greater than or equal to 1%: elevated eosinophils, BUN, and potassium; decreased lymphocytes; and alterations in neutrophils; with an incidence of less than 1%: elevated SGOT, SGPT and creatinine; decreased potassium; and alterations in sodium and glucose.
What is the most important information I should know about Zyn?
Zyn tablets may cause drowsiness, dizziness, blurred vision, or light-headedness. These effects may be worse if you take it with alcohol or certain medicines. Use Zyn tablets with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.
Zyn tablets may cause you to become sunburned more easily. Avoid the sun, sunlamps, or tanning booths until you know how you react to Zyn tablets. Use a sunscreen or wear protective clothing if you must be outside for more than a short time.
Mild diarrhea is common with antibiotic use. However, a more serious form of diarrhea (pseudomembranous colitis) may rarely occur. This may develop while you use the antibiotic or within several months after you stop using it. Contact your doctor right away if stomach pain or cramps, severe diarrhea, or bloody or watery stools occur. Do not treat diarrhea without first checking with your doctor.
Tell your doctor or dentist that you take Zyn tablets before you receive any medical or dental care, emergency care, or surgery.
Severe and sometimes fatal liver problems have been reported with the use of Zyn tablets. Contact your doctor immediately if you develop symptoms of liver problems (eg, yellowing of the skin or eyes; dark urine; pale stools; severe or persistent nausea, vomiting, or loss of appetite; unusual itching). Discuss any questions or concerns with your doctor.
Long-term or repeated use of Zyn tablets may cause a second infection. Tell your doctor if signs of a second infection occur. Your medicine may need to be changed to treat this.
Be sure to use Zyn tablets for the full course of treatment. If you do not, the medicine may not clear up your infection completely. The bacteria could also become less sensitive to this or other medicines. This could make the infection harder to treat in the future.
Zyn tablets only works against bacteria; it does not treat viral infections (eg, the common cold).
Use Zyn tablets with caution in the ELDERLY; they may be more sensitive to its effects, especially irregular heartbeat.
Zyn tablets should not be used in CHILDREN; safety and effectiveness in children have not been confirmed.
PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using Zyn tablets while you are pregnant. It is not known if Zyn tablets is found in breast milk. If you are or will be breast-feeding while you take Zyn tablets, check with your doctor. Discuss any possible risks to your baby.
Contraindication can be described as a special circumstance or a disease or a condition wherein you are not supposed to use the drug or undergo particular treatment as it can harm the patient; at times, it can be dangerous and life threatening as well. When a procedure should not be combined with other procedure or when a medicine cannot be taken with another medicine, it is called Relative contraindication. Contraindications should be taken seriously as they are based on the relative clinical experience of health care providers or from proven research findings.
You should not use this medication if you have ever had jaundice or liver problems caused by taking Zyn. You should not use Zyn if you are allergic to it or to similar drugs such as erythromycin (E.E.S., EryPed, Ery-Tab, Erythrocin, Pediazole), clarithromycin (Biaxin), telithromycin (Ketek), or troleandomycin (Tao).
There are many other medicines that can interact with Zyn. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor. Keep a list of all your medicines and show it to any healthcare provider who treats you.
Take this medicine for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Skipping doses may also increase your risk of further infection that is resistant to antibiotics. Zyn will not treat a viral infection such as the common cold or flu.
Avoid taking an antacid within 2 hours before or after you take Zyn. Some antacids can make it harder for your body to absorb Zyn.
DailyMed. "AZITHROMYCIN: DailyMed provides trustworthy information about marketed drugs in the United States. DailyMed is the official provider of FDA label information (package inserts).". https://dailymed.nlm.nih.gov/dailyme... (accessed September 17, 2018).
European Chemicals Agency - ECHA. "2R,3R,4R,5R,8R,10R,11R,13S,14R)-11-[(2S,3R,4S,6R)-4-dimethylamino-3-hydroxy-6-methyl-oxan-2-yl]oxy-2-ethyl-3,4,10-trihydroxy-13-[(2S,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyl-oxan-2-yl]oxy-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one: The information provided here is aggregated from the "Notified classification and labelling" from ECHA's C&L Inventory. ". https://echa.europa.eu/information-o... (accessed September 17, 2018).
The results of a survey conducted on ndrugs.com for Zyn are given in detail below. The results of the survey conducted are based on the impressions and views of the website users and consumers taking Zyn. We implore you to kindly base your medical condition or therapeutic choices on the result or test conducted by a physician or licensed medical practitioners.
3 consumers reported side effects
Did you experience side effects while taking Zyn drug? According to the report by ndrugs.com, the below mentioned statistics discuss the number of people who experienced side effects after taking Zyn drug. Every drug produces at least minor unwanted effects, which we call side effects. The side effects can be bothersome, or they can be minor so patients do not know they are experiencing them. The side effects of the drug depend on the individual, severity of disease, symptom, and associated conditions in the patient. The most deciding factor is the drug dosage. The higher the dosage, the higher the therapeutic result, and the more side effects. Every patient need not have the same intensity of side effect. When the side effects are greater, immediately consult your health care provider.
No side effects
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