As an AI language model, I can provide some information on the topic. However, it's important to note that I am not a dermatologist or a medical professional, so it's always best to consult with a healthcare provider or a dermatologist before combining any skincare ingredients.

Benzoyl peroxide and tranexamic acid are both active ingredients used in skincare, but for different purposes. Benzoyl peroxide is commonly used to treat acne due to its antibacterial and exfoliating properties. Tranexamic acid, on the other hand, is often used to address hyperpigmentation and melasma by inhibiting the production of melanin.

While there is limited research on the specific combination of benzoyl peroxide and tranexamic acid, it's generally advisable to avoid using them together. Benzoyl peroxide can be quite strong and may cause skin irritation or dryness, especially when used in combination with other active ingredients. Tranexamic acid, although generally well-tolerated, can also cause skin irritation in some individuals.

To ensure the safety and efficacy of your skincare routine, it's best to use one active ingredient at a time or consult with a dermatologist who can provide personalized advice based on your skin type and concerns. They can guide you on the best way to incorporate these ingredients into your skincare routine, whether separately or in combination with other compatible ingredients.