This article first appeared in Prevention in Focus , Spring 2011 edition, a publication of CATIE.
Une version française est disponible ici.
We spoke to four people with very different perspectives on PrEP.
- Dr. Mark Tyndall—Professor of Medicine, University of Ottawa
- Dr. Peter A. Newman—Associate Professor, Faculty of Social Work, University of Toronto Canada Research Chair in Health and Social Justice
- Jody Jollimore—Program Manager, Health Initiative for Men, Vancouver, British Columbia
- Shari Margolese—Community Consultant, Women and HIV Research Program, Toronto, Ontario
Dr. Mark Tyndall
Do you think PrEP has a role to play in Canada?
I would say “no.” I think we need to be open to all new prevention strategies, whether its technologies or behaviours, but in terms of what should be a priority in Canada, I don’t think PrEP will play much of a role.
The number of new infections just aren’t that high in Canada. You would have to treat a lot of people to prevent an infection. I couldn’t imagine putting people who are at a relatively low risk of infection on continuous antiretroviral medications. It’s just not necessary and the risks of the medications would outweigh the benefits.
With the prevention strategies we have now, we can actually keep HIV transmission to relatively low levels. I deal with the highest risk people in Vancouver and despite this I see very few new infections using the interventions that we now have. Give injecting drug users enough clean needles and they don’t get infected, give sex workers and gay men condoms and they don’t get infected.
It's true that some people aren’t doing what they could do to prevent HIV infection, but offering them another technology opens the door to a lot of problems and unintended consequences. Once one person starts taking a pill and having unprotected sex, others who are using condoms are going to want to take a pill so they can have unprotected sex too. If people are going from a form of prevention that is highly effective to prevention that is 60 or 70% effective, that is potentially going to put even more people at risk of infection.
If a gay man tells me that he will never use a condom and he will continue to have unprotected sex with anonymous partners, it seems counter-intuitive to me to give him a pill. He already has highly effective tools at hand to prevent exposure and we need to focus on removing the barriers that prevent him from using these tools. I don’t think we want to create a situation where taking a pill is how we prevent HIV infection because I think it will fail. We have not even discussed the problems with adherence, side-effects, drug resistance and the cost of PrEP.
Don’t get me wrong. I don’t think that we have figured out the optimal ways to deliver HIV prevention, or that specific groups are not in need of renewed prevention efforts, or that innovative strategies should not be developed, it’s just that I don’t see PrEP being a major addition to HIV prevention initiatives in Canada.
What can Canada do to prepare for the implementation of PrEP?
The epidemic among gay men in some Canadian cities is continuing because we are not doing a good enough job of reaching those at highest risk of infection. I think we need to keep working with the tools that we have and find more innovative ways to reach people at risk of infection and understand what drives their risk behaviour. I think we have let that slip.
We aren’t even prepared to give people post-exposure prophylaxis (PEP) and I think that’s an even more important debate. In British Columbia this has been an ongoing battle. If the exposure is the result of consensual sex, no matter how big the risk of infection is, the government won’t pay for PEP.
What will the role of ASOs be during the implementation of PrEP?
Staff at ASOs will be the ones who are asked many of the questions. They are going to have a big role in educating people about the potential downside of PrEP and helping to prevent the unintended consequences. My general feeling from those working in ASOs is that this is not some great new prevention tool and has the real potential to undermine other prevention efforts if not explained properly.

Dr. Peter A. Newman
Do you think PrEP has a role to play in Canada?
PrEP is going to play a role in Canada regardless of what you, me or people at the policy-level think. It exists and people may already be using it. Some gay men in the United States have engaged in self-administering PrEP for years and it’s likely to be a similar situation in Canada.
I would feel much more comfortable if different stakeholders in Canada recognize that PrEP is going to play a role, whether we like it or not, and become engaged in discussing the possible ramifications. PrEP is going to be much safer and more effective if it is delivered with as much education and strategizing as possible—by the people who represent the populations who will use it, people who have experience working with those populations, and hopefully social scientists as well.
What can Canada do to prepare for the implementation of PrEP?
Barriers in accessing culturally competent and appropriate care exist for many health conditions in Canada and will likely impact the use of any new HIV prevention technologies that become available. It will be important to use the possible introduction of PrEP as an opportunity to bring attention to the barriers that prevent disenfranchised populations from accessing medical care. We need to develop strategies to overcome these challenges and improve access to healthcare where inequalities exist.
A lot of individuals from marginalized populations have not had good experiences with the healthcare system and this may discourage them from accessing PrEP and using it correctly. We need more specialized health clinics that serve marginalized populations that may be at risk for HIV infection and could benefit from new HIV prevention options.
What will the role of social science be in the implementation of PrEP?
There is no HIV prevention technology that can reasonably ignore human behaviour, human decision-making, relationships, and other messy things like emotions. It doesn’t exist. We know people make mistakes and human behaviour isn’t perfect. There are going to be particular challenges with the uptake and use of a technology that is partially protective. We have to look at any new prevention technology in the light of real-world human behaviour and human decision-making.
Social and behavioral science needs to be involved from the get-go, from the clinical trial stage through to the roll-out and beyond. We can potentially learn a lot about possible behavioural challenges from clinical trials but it’s very difficult to predict exactly what’s going to happen when the technology is rolled out. Social and behavioural monitoring during the rollout of PrEP will be important to guide implementation changes and change the course of action if needed. Unfortunately, social and behavioural science tends to be given a lower priority than biomedical science until things start to go wrong.
Front-line service providers will need to be included in social science research. They have intimate knowledge of what’s happening on the ground and have a good idea of what might happen and how it might happen. All this information needs to be to be factored into the development of implementation policy and strategy.

Jody Jollimore
Do you think PrEP has a role to play in Canada?
Absolutely. I think PrEP is shaping up to be a very important tool in the risk reduction toolkit. To me, the main benefit PrEP offers is choice. The more prevention options that we can make available, to gay men and other people at risk of infection, the better.
Thirty years into the epidemic, condoms are still the only tool that gay men have for preventing HIV and its high time we found more biomedical prevention options. The need is there. We recently did a Man-Count survey as part of the national M-track study in Canada, and a large percentage of gay men reported the use of serosorting and strategic positioning as a risk reduction method. These are unproven strategies but men are employing them based on the little information that they have available.
PrEP could be an option for people who are putting themselves in sexual situations that are high risk and are not using condoms consistently. If people rely on PrEP, and decrease their use of condoms, then it’s not going to be effective, but I think we have to give people a certain level of trust and assume that when given accurate information about risk, and the various hazards associated with PrEP (or with using condoms or serosorting or strategic positioning), that people will find the best option that is appropriate for them.
What can Canada do to prepare for the implementation of PrEP?
Before we implement another risk reduction strategy such as PrEP, we have a lot work to do in re-educating the people in Canada about what HIV means today. The last major widespread education campaign was done in the late 80s, early 90s, and a lot of research has happened over the last two decades that we haven’t updated people on. People are unclear about viral load, acute HIV infection, post-exposure prophylaxis, and testing technologies and how they can be used to reduce HIV transmission.
We also need to get people to understand what “risk” is. We can’t still have guys thinking that a handjob is risky and have other people thinking unprotected anal sex is not. We really need to create a common understanding of what risk is before we can introduce partially protective tools, such as PrEP, that reduce your risk.
What will the role of front-line service providers be in the implementation of PrEP?
Community organizations will have a huge role to play in ensuring adherence and reminding PrEP users that this is a pill-a-day option and that pill needs to be taken for it to work. We also need to be there to ensure there are still condoms, lube, and as much information as possible so that people at risk of infection know that PrEP is not their only option.

Shari Margolese
Do you think PrEP has a role to play in Canada?
I don’t see PrEP as being a widespread option to be distributed to the general public but it may play a role under certain circumstances and indications. There is a lot of interest in the use of PrEP among serodiscordant couples who want to conceive and this is relevant to our work at the Women and HIV Research Program at the Women’s College Research Institute [at Women’s College Hospital].
Currently, serodiscordant couples have several options available to them in order to conceive and these options can significantly reduce or eliminate the risk of HIV transmission between partners. Techniques such as sperm-washing (if the man is HIV-positive) and assisted reproduction are available at a limited number of fertility clinics in Canada. Access and cost are significant barriers to the use of these conception options, particularly for couples from smaller cities and rural areas in Canada.
I could see PrEP playing a role for serodiscordant couples who do not have access to fertility clinics, cannot afford fertility services, or want to conceive through unprotected sex for cultural or personal reasons. Access and cost may be less of an issue for PrEP because it could be obtained from wherever the HIV-positive partner is getting their HIV medications. PrEP may also be more affordable but the cost will depend on how long the medications need to be taken for before and after intercourse.
Serodiscordant couples trying to conceive through unprotected sex would need to use PrEP in combination with other strategies; it’s not going to be a tool that will be used independently of others. We know that serodiscordant couples are doing their own research and finding that the risk of transmission is reduced if the HIV-positive partner has an undetectable viral load, both partners are free of other sexually transmitted infections, and intercourse is timed to occur during ovulation (so the number of exposures are reduced). For these couples, PrEP may further reduce the risk of HIV transmission but there is limited data on the use of PrEP in this context.
What could Canada do to better prepare for the implementation of PrEP?
The role of PrEP was discussed while developing the National HIV Pregnancy Planning Guidelines, but we felt there wasn’t enough evidence that was transferable to heterosexual populations to determine whether or not PrEP would be advantageous in conception. We need more evidence before we can make recommendations on the use of PrEP and I think Canada could play a role in the research.
There are some studies that are currently ongoing, or in the planning stages, in other parts of the world and they are looking at the use of PrEP for two days before and two days after intercourse. I think we need to work collaboratively with the groups conducting this research and contribute to the evidence. Once we have enough evidence that is transferable to the Canadian context, we will need to develop guidelines that include prescribing information, counselling protocols, and other factors that need to be in place before initiating PrEP.
What role will ASOs play in the implementation of PrEP?
ASOs will play an important role in community outreach and education. If the evidence shows that PrEP could be a useful tool in pregnancy planning, then we would need to add it to existing information that is found in educational materials and workshops for serodiscordant couples. There could also be an advocacy role to inform public policy on PrEP and also improve access to existing conception services.
For more detailed information on pre-exposure prophylaxis, see Preparing for pre-exposure prophylaxis.
See also a link to CATIE PrEP resources:
See also CATIE News by Sean Hosein about adherence and PrEP trial results.
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