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Growing older with HIV and drug interactions
Whilst, many people infected with HIV do not have access to antiretroviral treatment, those that do are living for longer. However, living with HIV leads to further problems that HIV infected people must address, as they grow older.
Managing multiple health conditions
Some health conditions tend to occur more frequently and earlier in life among HIV-positive individuals, compared to their HIV-negative counterparts. The risk of antiretrovirals interacting with drugs taken for other medical conditions can cause significant problems for the management of HIV. This is particularly true for older people living with HIV, as studies indicate that they are more likely to be taking a greater number of drugs than young HIV-positive individuals.
In one study, HIV-positive individuals aged 60 or older took certain drugs significantly more often than young HIV-positive individuals.1 These included:
- Drugs for cardiovascular disease
- Musculoskeletal agents
- Drugs for gastrointestinal problems
When taking antiretroviral treatment, people living with HIV often have to deal with issues such as severe side effects and/or resistance to treatment. This can narrow the antiretroviral drugs available to them. If they also have another condition that requires treatment, this must be treated with the issue of drug interactions in mind. In some cases, treatment options may become very limited. Drug-drug interaction tables are useful to show how drugs for other conditions might interact with antiretroviral drugs.
For example, according to drug interaction tables, some drugs used to treat and/or prevent cardiovascular disease can react with certain antiretroviral drugs. For instance, some of the drugs grouped under the terms Beta Blockers or Statins should not be taken with certain antiretroviral drugs.
The risk of an interaction is listed under 4 categories: No clear data; no clinically significant interaction expected; potential interaction; drugs should not be co-administered.
For example, the table below demonstrates the risk of interaction between the statin Atorvastatin and four different antiretrovirals2
The risk of a drug interaction occurring depends on a number of factors that a doctor will take into account when managing an individual’s treatment. Whilst one person may not be able to take a certain drug, another individual may be able to take this without any risk of an interaction.
See www.hiv-druginteractions.org to compare your medication.
- 1. Mascoloni, M (2010, October 4-5) 'Higher Risk of Potential Drug-Drug Interactions in Toronto HIV Patients Over 60' First International Workshop on HIV and Aging: Conference Reports for NATAP
- 2. Drug Interaction Charts (Accessed 2011) 'Simvastatin interactions'