Zithromax, Zithromax Z-Pak, Azasite
Azithromycin, azithromycin monohydrate, azithromycin dihydrate
Treats bacterial infections.
Antibiotic, macrolide
Tablet, oral suspension (liquid), packets for oral suspension, injection, eye drops
By mouth
Azithromycin treats a broad spectrum of mild to moderate bacterial infections including bacterial pneumonia, strep throat, bronchitis, sinusitis, middle ear infections, skin infections, chlamydia, gonorrhea, pelvic inflammatory disease, and genital ulcers.
Tablet
250 mg
500 mg
600 mg
Oral suspension (liquid)
100 mg/5 mL
200 mg/5 mL
Packets for oral suspension
1 g/packet
Injection
500 mg/vial
Eye drops
1% (10 mg/mL)
For bacterial infections in adults including pneumonia and strep throat: 500 mg dose on day 1 followed by 250 mg per day for four days
For gonorrhea in adults: 1 gram single dose
For genital ulcers (chancroid) or chlamydia in adults: 2 gram single dose
For pelvic inflammatory disease: 500 mg IV injection per day for one to two days followed by 250 mg per day taken by mouth for five to six days
For bacterial sinusitis: 500 mg daily for three days
For mycobacterium lung infection: 500–600 mg per day
For middle ear infections (otitis media) in children: 30 mg/kg as a single dose OR 10 mg/kg daily for three days
For strep throat in children: 12 mg/kg daily for five days
For bacterial conjunctivitis: 1 drop in each eye twice daily for two days then 1 drop in each eye daily for five days
For children’s dosages and other indications, find more details about Zithromax dosage, forms, and strengths here.
Azithromycin
15ml of 100mg/5ml bottle
Azithromycin
15ml of 200mg/5ml bottle
Azithromycin
22.5ml of 200mg/5ml bottle
Azithromycin
30ml of 200mg/5ml bottle
Azithromycin
3 tablets box
Azithromycin
6 tablets box
Azithromycin
3 tablets disp pack
Azithromycin
6 tablets disp pack
Azithromycin
1gm packet
Azithromycin
500mg solution reconstituted
Azithromycin
250mg tablet
Azithromycin
500mg tablet
Azithromycin
600mg tablet
Your doctor will tell you how much medicine to use. Do not use more than directed.
Take all of the medicine in your prescription to clear up your infection, even if you feel better after the first few doses.
Read and follow the patient instructions that come with this medicine.
How to take azithromycin tablets
Azithromycin tablets can be taken with or without food.
Swallow the tablet whole.
Store azithromycin tablets at room temperature.
How to take azithromycin oral suspension
Azithromycin oral suspension can be taken with or without food.
Shake the bottle before opening it and measuring a dose.
Use a calibrated oral syringe or other medicine-measuring device. If it’s missing, a pharmacist can provide one for free. Do not use kitchen or table utensils to measure out a dose.
Store azithromycin oral suspension in a closed bottle at room temperature.
How to take azithromycin packets for oral suspension
You will only use one or two packets in total.
Use one packet per day.
Open the packet and pour all of the powder into a glass.
Add 2 ounces (1/4 cup) of water and mix
Drink the medicine right away.
Add 2 more ounces of water into the same glass and mix.
Drink the remaining mixture.
Store unopened azithromycin packets at room temperature.
How to take azithromycin eye drops (AzaSite)
Read the Instructions for Use that come with this medicine.
Wash your hands with soap and water before applying a dose.
Hold the bottle upside down and shake the bottle.
Remove the tan cap.
Tilt your head back.
Squeeze one drop on each infected.
Replace the cap.
Store the eye drops in the original closed bottle at room temperature.
If you keep forgetting doses, talk to a healthcare provider or pharmacist about tools that can help you remember.
Take a missed dose as soon as it’s remembered. However, if it is almost time for the next dose, skip the missed dose and take the next scheduled dose on time.
Do not take extra medicine to make up for a missed dose.
This medicine is not right for everyone.
Do not use it if you have had an allergic reaction to azithromycin, erythromycin, or similar medicines.
Do not use azithromycin if you have a history of liver problems caused by azithromycin.
Tell any doctor or other healthcare provider who treats you that you are using this medicine.
Your doctor may need to examine you or perform blood tests to monitor the effects of this medicine. Keep all appointments.
Call your doctor if your symptoms do not improve or if they get worse.
Tell your doctor if you are pregnant or breastfeeding.
Before taking azithromycin, inform the prescriber about any medical conditions you may have, particularly:
Liver disease
Kidney disease
Heart rhythm problems
Heart failure
Any recent heart attack
Myasthenia gravis
Any bacterial infection of the blood
Any infection caught in a hospital
Cystic fibrosis
Pneumonia
Weakened immune system
This medicine may cause the following problems:
Liver damage
Heart rhythm irregularities
Swollen pancreas
Worsening of myasthenia gravis
This medicine can cause diarrhea due to bacterial overgrowth in the intestines. It may occur 2 months or more after you stop taking this medicine. Call your doctor if the diarrhea becomes severe, does not stop, or is bloody. Do not take any medicine to stop diarrhea until you have talked to your doctor.
This medicine can cause digestive system blockage in newborns. Symptoms include vomiting and irritability when feeding.
To avoid potentially hazardous drug interactions, tell the prescribing healthcare provider about all prescription drugs, over-the-counter medications, and supplements you use before taking azithromycin.
Tell other healthcare providers you are using this medicine before they prescribe new medications.
Do not take an antacid that contains magnesium or aluminum at the same time you take an oral dose of azithromycin.
Some drugs may cause problems when taken with azithromycin. Make sure to tell the prescribing healthcare professional if you are currently taking:
Blood thinners
Heart rhythm drugs
Migraine medications called ergots
The heart failure drug digoxin
The immune suppressant cyclosporine
The antiseizure medication phenytoin
The HIV/AIDS drug nelfinavir
The gout treatment colchicine
The antipsychotic medications pimozide and thioridazine
Avoid alcohol when taking azithromycin.
Find out more about azithromycin interactions to avoid here.
Serious side effects
Talk to a doctor if you notice any signs or symptoms of a possible serious side effect including:
Severe diarrhea, bloody diarrhea, stomach cramps, fever
Dark urine, pale stools, nausea, vomiting, loss of appetite, stomach pain, yellow skin or eyes
Fast, pounding, or uneven heartbeat, chest pain
Feeling irritable or vomiting after feeding (in very young babies)
Blistering, peeling, red skin rash
Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
Less serious side effects
Nausea
Mild diarrhea
Abdominal pain
Vomiting
Injection site reactions such as burning, pain, or irritation (injection)
Eye irritation (azithromycin eye drops)
Find more detailed information about azithromycin side effects here.
Azasite azithromycin monohydrate solution prescribing information, DailyMed, IH National Library of Medicine
Azithromycin dihydrate powder for suspension prescribing information, DailyMed, NIH National Library of Medicine
Azithromycin dihydrate tablet prescribing information, DailyMed, NIH National Library of Medicine
Azithromycin monohydrate injection prescribing information, DailyMed, NIH National Library of Medicine
Zithromax azithromycin dihydrate tablets/powder for suspension prescribing information, DailyMed, NIH National Library of Medicine
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