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The Effect of Stomach Acid on Foscarnet

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ClinicalTrials.gov Identifier: NCT00000964
Recruitment Status : Completed
First Posted : August 31, 2001
Last Update Posted : October 29, 2021
Sponsor:
Information provided by (Responsible Party):
National Institute of Allergy and Infectious Diseases (NIAID)

Study Description
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Brief Summary:

To see if ranitidine, by reducing stomach acidity, can enhance the effectiveness of foscarnet, by making foscarnet more available to the body.

Foscarnet is an antiviral compound. Laboratory studies have shown it to be active against HIV. However, only 12 - 22 percent of an oral foscarnet dose is absorbed by the body. Ranitidine suppresses gastric acid output, increasing gastric pH. Thus by increasing gastric pH (decreasing stomach acidity), less foscarnet is expected to be decomposed or broken down in the stomach. Thus, more foscarnet should be absorbed into the body.


Condition or disease Intervention/treatment Phase
HIV Infections Drug: Ranitidine hydrochloride Drug: Foscarnet sodium Phase 1

Detailed Description:

Foscarnet is an antiviral compound. Laboratory studies have shown it to be active against HIV. However, only 12 - 22 percent of an oral foscarnet dose is absorbed by the body. Ranitidine suppresses gastric acid output, increasing gastric pH. Thus by increasing gastric pH (decreasing stomach acidity), less foscarnet is expected to be decomposed or broken down in the stomach. Thus, more foscarnet should be absorbed into the body.

Six asymptomatic HIV-infected males, or those with limited symptoms of early AIDS-related complex ( ARC ), will receive one dose intravenously of ranitidine in distilled water and one dose of placebo (distilled water alone), followed in 1 hour by foscarnet in oral solution. The order of ranitidine and placebo is randomized and the two foscarnet doses are separated by at least 72 hours. A nasogastric pH probe is placed on each morning of drug administration to monitor gastric pH.

Study Design
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Study Type : Interventional  (Clinical Trial)
Enrollment : 6 participants
Primary Purpose: Treatment
Official Title: The Effect of Increasing Gastric pH Upon the Bioavailability of Orally Administered Phosphonoformic Acid (Foscarnet)
Actual Study Completion Date : October 1990

Resource links provided by the National Library of Medicine

MedlinePlus related topics: HIV/AIDS

Arms and Interventions
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Outcome Measures
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Eligibility Criteria
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Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria

Concurrent Medication:

Allowed:

  • Acetaminophen and sedatives.

Patient must be able to give informed consent.

Exclusion Criteria

Patients with the following are excluded:

  • Unintentional weight loss in excess of 10 pounds or 10 percent of usual body weight within 2 years prior to study.
  • Unexplained temperature above 38 degrees Celsius on more than 5 consecutive days or on more than 10 days in any 30 days in 2 years prior to expected study entry.
  • Unexplained diarrhea defined by two or more stools/day for at least 14 days during a 120-day interval.

Prior Medication:

Excluded within 1 week of entry into study:

  • Probenecid, aspirin, or diuretics.
Contacts and Locations
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Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00000964


Locations
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United States, Maryland
Johns Hopkins Adult AIDS CRS
Baltimore, Maryland, United States, 21205
Sponsors and Collaborators
National Institute of Allergy and Infectious Diseases (NIAID)
Investigators
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Study Chair: DM Kornhauser
More Information
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Publications:

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Responsible Party: National Institute of Allergy and Infectious Diseases (NIAID)
ClinicalTrials.gov Identifier: NCT00000964    
Other Study ID Numbers: ACTG 136
11111 ( Registry Identifier: DAIDS ES Registry Number )
First Posted: August 31, 2001    Key Record Dates
Last Update Posted: October 29, 2021
Last Verified: October 2021
Keywords provided by National Institute of Allergy and Infectious Diseases (NIAID):
Ranitidine
Phosphorus Acids
Drug Evaluation
Acquired Immunodeficiency Syndrome
Additional relevant MeSH terms:
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HIV Infections
Blood-Borne Infections
Communicable Diseases
Infections
Sexually Transmitted Diseases, Viral
Sexually Transmitted Diseases
Lentivirus Infections
Retroviridae Infections
RNA Virus Infections
Virus Diseases
Immunologic Deficiency Syndromes
Immune System Diseases
Foscarnet
Phosphonoacetic Acid
Ranitidine
 Ranitidine bismuth citrate
Anti-Ulcer Agents
Gastrointestinal Agents
Histamine H2 Antagonists
Histamine Antagonists
Histamine Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Antiviral Agents
Anti-Infective Agents
Reverse Transcriptase Inhibitors
Nucleic Acid Synthesis Inhibitors
Enzyme Inhibitors