May 24, 2017
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(didanosine, USP) Pediatric Powder for Oral Solution



Fatal and nonfatal pancreatitis has occurred during therapy with VIDEX used alone or in combination regimens in both treatment-naive and treatment-experienced patients, regardless of degree of immunosuppression. VIDEX should be s us pended in patients with suspected pancreatitis and discontinued in patients with confirmed pancreatitis [see WARNINGS AND PRECAUTIONS].

Lactic acidosis and severe hepatomegaly with steatosis, including fatalcases, have been reported with the use of nucleoside analogues alone or in combination, including didanosine and other antiretrovirals. Fatal lacticacidos is has been reported in pregnant women who received the combination of didanosine and stavudine with other antiretroviral agents. The combination of didanosine and stavudine should be used with caution during pregnancy and is recommended only if the potential benefit clearly outweighs the potential risk [see WARNINGS AND PRECAUTIONS].


VIDEX® is a brand name for didanosine, USP, a synthetic purine nucleoside analogue active againstHIV-1.

Didanosine is available as VIDEX, a Pediatric Powder for Oral Solution [see HOW SUPPLIED/Storage and Handling] and as VIDE® EC Delayed-Release Capsules, containing enteric-coated beadlets [consult prescribing information for VIDEX EC (didanosine)].

The chemical name for didanosine is 2',3'-dideoxyinosine. The structural formula is:

VIDEX (didanosine)Structural Formula Illustration

Didanosine is a white crystalline powder with the molecular formula C10H12N4O3 and a molecular weight of 236.2. The aqueous solubility of didanosine at 25° C and pH of approximately 6 is 27.3 mg per mL. Didanosine is unstable in acidic solutions. For example, at pH less than 3 and 37° C, 10% of didanosine decomposes to hypoxanthine in less than 2 minutes.

What are the possible side effects of didanosine (Videx, Videx EC)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Didanosine may cause lactic acidosis (a build-up of lactic acid in the body, which can be fatal). Lactic acidosis can start slowly and get worse over time. Get emergency medical help if you have even mild symptoms of lactic acidosis, such as:

  • muscle pain or weakness;
  • numb or cold feeling in your arms and legs;
  • trouble breathing;
  • feeling dizzy, light-headed, tired, or very...

Read All Potential Side Effects and See Pictures of Videx »

What are the precautions when taking didanosine pediatric powder for oral solution (Videx)?

Before taking didanosine, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: pancreatitis, kidney problems, liver problems (such as hepatitis, cirrhosis), nerve problems (such as peripheral neuropathy), alcohol use, high fat levels in the blood (triglycerides), gall bladder problems (such as gallstones), gout.

Avoid alcoholic beverages because they may increase your risk for liver problems and pancreatitis.

Didanosine may increase your risk of a heart attack. Discuss the risks and...

Read All Potential Precautions of Videx »

Last reviewed on RxList: 12/20/2016
This monograph has been modified to include the generic and brand name in many instances.

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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