Yes, The Hair Topical Solution Classic, The Hair Topical Solution Modern, and The Hair Pill can all be used together. Using multiple hair loss treatments in combination may help enhance results.
If you’re using both topical solutions, The Hair Topical Solution Modern should be applied first, as it contains exosomes, which are absorbed most efficiently when applied before other products. Applying the Classic formulation afterward is not expected to disrupt exosome activity, but if you’d prefer to be cautious, waiting a few minutes between applications is a reasonable option.