Zithromax contains the active ingredient azithromycin as a dihydrate, which is a macrolide antibacterial drug designed for oral administration. It is available as tablets containing azithromycin dihydrate equivalent to 600 mg azithromycin, and as a single-dose oral suspension packet containing azithromycin dihydrate equivalent to 1 g azithromycin. Key inactive ingredients for the tablets include dibasic calcium phosphate anhydrous and pregelatinized starch, while the oral suspension includes colloidal silicon dioxide and sucrose.

How should I use this medication?

Take this medication by mouth with a full glass of water. Take it as directed on the prescription label. You can take it with food or on an empty stomach. If it upsets your stomach, take it with food. Take your medication at regular intervals. Do not take your medication more often than directed. Take all of your medication unless your care team tells you to stop it early. Keep taking it even if you think you are better. Talk to your care team about the use of this medication in children. While it may be prescribed for children for selected conditions, precautions do apply.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once. NOTE: This medicine is only for you. Do not share this medicine with others.

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

Where should I keep my medication?

Keep out of the reach of children and pets. Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Throw away any unused medication after the expiration date.

NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

What side effects may I notice from receiving this medication?

Side effects that you should report to your care team as soon as possible: -Allergic reactions or angioedema—skin rash, itching, hives, swelling of the face, eyes, lips, tongue, arms, or legs, trouble swallowing or breathing -Heart rhythm changes—fast or irregular heartbeat, dizziness, feeling faint or lightheaded, chest pain, trouble breathing -Liver injury—right upper belly pain, loss of appetite, nausea, light-colored stool, dark yellow or brown urine, yellowing skin or eyes, unusual weakness or fatigue -Rash, fever, and swollen lymph nodes -Redness, blistering, peeling, or loosening of the skin, including inside the mouth -Severe diarrhea, fever -Unusual vaginal discharge, itching, or odor Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome): -Diarrhea -Nausea -Stomach pain -Vomiting

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What should I tell my care team before I take this medication?

They need to know if you have any of these conditions: -History of blood diseases, such as leukemia -History of irregular heartbeat -Kidney disease -Liver disease -Myasthenia gravis -An unusual or allergic reaction to azithromycin, other medications, foods, dyes, or preservatives -Pregnant or trying to get pregnant -Breastfeeding

What may interact with this medication?

Do not take this medication with any of the following: -Cisapride -Dronedarone -Pimozide -Thioridazine This medication may also interact with the following: -Antacids that contain aluminum or magnesium -Colchicine -Cyclosporine -Digoxin -Ergot alkaloids, such as dihydroergotamine, ergotamine -Estrogen or progestin hormones -Nelfinavir -Other medications that cause heart rhythm change -Phenytoin -Warfarin

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medication?

Tell your care team if your symptoms do not start to get better or if they get worse. This medication may cause serious skin reactions. They can happen weeks to months after starting the medication. Contact your care team right away if you notice fevers or flu-like symptoms with a rash. The rash may be red or purple and then turn into blisters or peeling of the skin. Or, you might notice a red rash with swelling of the face, lips or lymph nodes in your neck or under your arms. Do not treat diarrhea with over the counter products. Contact your care team if you have diarrhea that lasts more than 2 days or if it is severe and watery. This medication can make you more sensitive to the sun. Keep out of the sun. If you cannot avoid being in the sun, wear protective clothing and use sunscreen. Do not use sun lamps or tanning beds/booths.