Hello, welcome to Ask a Doctor service. I ve gone through your query and I m going to share my thoughts about it with you. There is no contraindication to use citalopram with testosterone supplements, therefore they can be used together. But there is another thing to consider here. Using testosterone boosters is not as safe as it sounds, so unless a doctor prescribed it to you (or advised you to use it) you d better avoid it. A male s body regulates testosterone levels according to its needs and genetic structure. Violating the normal regulation may cause harm to various parts of your body. The liver for example may become prone to tumor-formation while the benefits from using an unnecessary drug will be minimal (if any). Of course this advise would only be valid if you decided to take such a supplement without your doctor s advice. I m just commenting on it because many men are tempted to do so for various reasons and without (or even against) their doctors advice. I hope I ve answered your query! Let me know if I can further assist you. Kind Regards!