Pharmacovigilance Initiative

Guest Post: Antiretroviral Drug Interactions with Non-Prescription Medications

This article was originally published as a Pharmacovigilance Initiative Safety Alert by the British Columbia Centre for Excellence in HIV/Aids on June 6, 2017. Patient safety concern Drug interactions between antiretroviral drugs and other medications can result in loss of therapeutic efficacy or drug toxicity. Selected proton pump inhibitors and inhaled corticosteroids recently became available

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SAFETY UPDATE: Antiretroviral drug interactions with non-prescription medications

June 2017 – Drug interactions between antiretroviral drugs and other medications can result in loss of therapeutic efficacy or drug toxicity. Selected proton pump inhibitors and inhaled corticosteroids recently became available as non-prescription products in BC. These, and other non-prescription medications, can have clinically important interactions with certain antiretroviral drugs. This bulletin summarizes clinically important

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SAFETY UPDATE: Nevirapine 400 mg XR (Viramune XRâ„¢) tablet remnants in feces

September 17, 2012 – The Pharmacovigilance Program at the BC Centre for Excellence in HIV/AIDS has received reports of patients seeing nevirapine 400 mg XR (extended release) tablets or tablet fragments in their feces (stools). In BC, approximately 4% of patients treated with nevirapine XR have reported seeing tablet remnants in their stool. Nevirapine 400

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SAFETY ALERT: RITONAVIR AND INTRA-ARTICULAR TRIMCINOLONE ACETONIDE INJECTION

June, 2010 – The Pharmacovigilance Program at the BC Centre for Excellence in HIV/AIDS has received four reports of suspected drug interaction between ritonavir and triamcinolone acetonide intra-articular injection leading to symptoms of corticosteroid excess (Cushingoid features) and adrenal suppression. The affected patients were HIV-infected adults whose antiretroviral therapy included a protease inhibitor boosted with

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SAFETY WARNING: ABACAVIR USE IN HLA-B*5701 POSITIVE PATIENTS AND UNTESTED PATIENTS

July, 2009 – The Pharmacovigilance Initiative at the BC Centre for Excellence in HIV/AIDS received a report of an HLA-B*5701 positive patient who had tolerated long term abacavir therapy, discontinued antiretroviral drugs for several months, then developed a diffuse rash, respiratory distress and fever shortly after re-initiating an abacavir-containing regimen. The symptoms and rapid onset were

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During the Canada Post strike announced September 25, 2025, the following measures will be undertaken to minimize service disruption to BC-CfE clients and providers.

  • The BC-CfE Laboratory has transitioned to private courier for delivery of outgoing reports and documents. Results required urgently can be faxed upon request. (Lab Contact Information: Phone 604-806-8775; FAX 604-806-9463)
  • The BC-CfE Drug Treatment Program (DTP) will fax outgoing forms and documents to the provider’s office. (DTP Contact Information: Phone 604-806-8515; FAX 604-806-9044)
  • St. Paul’s Hospital Ambulatory Pharmacy has transitioned to private courier for delivery of medications. We recommend requesting medication at least 2 weeks in advance in case of delivery delays, particularly to rural/remote parts of BC. (Contact Information: Phone 1-800-547-3622; FAX 604-806-8675)

During the Canada Post strike, we recommend that documents be faxed or couriered to our sites, versus utilization of regular mail service

The BC-CfE Laboratory is streamlining reporting processes for certain tests in order to simplify distribution and record-keeping, and to ensure completeness of results. Beginning September 2, 2025, results for the ‘Resistance Analysis of HIV-1 Protease and Reverse Transcriptase’ (Protease-RT) and ‘HIV-1 Integrase Resistance Genotype’ tests will be combined into a single ‘HIV-1 Resistance Genotype Report’.
For more details and example reports, please click on the button below