Common side effects of Growacet™ include: lack of headaches, visual acuity, increased cognition, lower blood pressure, and increased energy.
Other side effects include: uncontrollable optimism, a happier life, decreased desire to listen to talk radio, severe aversion to images of Megyn Kelly, increased testosterone levels, smiling, and decreased patience for major media.  If optimism lasts for more than four hours, seek immediate resupply.