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Update on Drugs and Drug News: October 2010


Name/Company Approval Dates and Comments

Velaglucerase alfa
VPRIV®
Shire plc

The European Commission (European Medicines Agency) has approved this hydrolytic lysosomal glucocerebroside-specific enzyme (human cell line derived) in August 2010 for long-term enzyme replacement therapy in pediatric and adult patients with Type 1 Gaucher disease. Therapy is administered every other week by intravenous infusion. US FDA approval for this drug was granted in February 2010.


Drug News

A vaginal gel containing tenofovir disoproxil fumarate (Viread®, Gilead Sciences Inc.), a nucleotide reverse transcriptase inhibitor, demonstrated protection against HIV/AIDS infection. The CAPRISA 004 trial investigated the efficacy and safety of tenofovir 1% vaginal gel for the prevention of HIV infection in women. Karim et al.* conducted a double-blind, randomized controlled trial comparing tenofovir gel (n=445) with placebo gel (n=444) in sexually active, HIV-negative females aged 18-40 years. Patients were instructed to administer one dose 12 hours pre-sex and a second dose as soon as possible within 12 hours after sex, but no more than two doses in a 24-hour period. The results reported were derived from monthly follow-up visits for 30 months. HIV serostatus, safety, sexual behavior, and gel and condom use were assessed at each study visit. HIV incidence in patients receiving tenofovir gel was 5.6 per 100 women-years, compared with 9.1 per 100 women-years in the placebo arm (incidence rate ratio=0.61; p=0.017). In the tenofovir gel treatment group, HIV incidence was reduced by 54% (p=0.025) in high adherers (gel adherence >80%), 38% in intermediate adherers (gel adherence 50-80%), and 28% in low adherers (gel adherence <50%); the overall reduction in HIV infection was 39%. No increase in the adverse event rates was observed between groups. If validated by further studies, this antiretroviral microbicide has the potential to significantly reduce AIDS risk in women.

*Karim QA, et al. Effectiveness and safety of tenofovir gel, an antiretroviral microbicide, for the prevention of HIV infection in women. Science (2010 Jul 19) [e-pub ahead of print].

Recently, the US Centers for Disease Control and Prevention’s Advisory Committee on Immunization Practices (ACIP) issued updated recommendations on the human papillomavirus (HPV) bivalent (Cervarix®, GlaxoSmithKline) and quadrivalent (Gardasil®, Merck & Co., Inc.) vaccines. ACIP revisions include:

  • Vaccination may be started at 9 years of age, but routine vaccination is recommended for females aged 11 or 12 years with 3 doses of HPV vaccine.
  • Catch-up vaccination is proposed for females aged 13-26 years of age who have not been vaccinated previously or who have not completed the 3-dose series. Remaining doses can be completed by women =26 years, but should be done so prior to any potential HPV exposure through sexual contact.
  • Although routine vaccination of males is not recommended, the 3-dose series of the quadrivalent vaccine may be given to males aged 9-26 years for reducing the risk of genital warts.
The updated recommendations are viewable at: http://www.cdc.gov/mmwr/PDF/wk/mm5920.pdf

Health Canada recently approved a labelling change for isopropyl myristate 50% rinse (Resultz®, Nycomed) to include the treatment of lice in children =2 years of age. This nonpediculicidal treatment has a physical mode of action that dissolves the outer layer of the exoskeleton, making resistance unlikely to develop.


In this issue:

  1. The Current Management of Delusional Parasitosis and Dermatitis Artefacta
  2. Nanodermatology: A Glimpse of Caution Just Beyond the Horizon - Part II
  3. Update on Drugs and Drug News: October 2010