As an advocate and practitioner of participatory research and practice, the ethical concerns in this type of work are raised not to discourage its use but to address some critical issues. Participatory researchers and practitioners often engage in their work with great enthusiasm and with confidence that the results will provide directions that the participants will appreciate and from which they will draw benefits. However, enthusiasm and energy can mask some of the ethical concerns that must be addressed. The issues fall into a number of overlapping areas, including the techniques used to solicit participants, the ability to project the amount of time and labor necessary in becoming a participant, unexpected events over the course of the work that may compromise the health and safety of participants, expectations of outcomes that may exceed what is possible, issues that relate to publications that emerge from the research (for example, authorship of writing, disclosure of personal information that may violate people's privacy and anonymity) and the empowerment of participants through participation in the project that cannot be followed up in their lives after termination of the research. I will address some of these concerns using examples from my research and that of colleagues. Some of the potential problems can be anticipated as planning ensues and can be addressed by the research team. Others are more subtle and may not be apparent until the research or project is completed, but also need to be dealt with by discussions with as many participants as possible. The opportunity afforded by this IAPS meeting to share research and project experiences and deal with these troubling but important issues can yield directions to those interested in pursuing this form of work.