how will you certainly get sides? I take dutasteride every day an don't have sides. Adding .5mg dose of dutasteride will lower your DHT levels beyond what finasteride alone would for sure but not as much as taking dutasteride every day. You cant base such a miniscule change in DHT levels' effectiveness on individuals' perceived results vs. finasteride alone because the difference is so small. I think you would be better off just taking dutasteride every 3rd day and stopping he finasteride than to continue taking finasteride if what you want is higher DHT inhibition but not quite greater than 90% inhibition