[intro] Many Different antiviral medications used to treat her peas have a variety of potential side effects, according to a study published by the Center for Disease and Disease Prevention in Atlanta and the University of California Medical School. [verse] Here's a breakdown of common and serious side effects: Common side effects are Headache Nausea and Vomiting Diarrhea Stomach pain Loss of appetite Dizziness Fatigue or feeling tired Rash Joint pain [pre chorus] Serious side effects can be Kid ney problems: Acyclovir and Valacyclovir can be harmful to the kidneys, particularly for individuals with pre-existing kid knee disease, according to herpcom. [Chorus] Central Nervous System effects: In rare cases, Valacyclovir may affect the CNS, leading to confusion, agitation, hallucinations, seizures, or changes in behavior. Blood disorders: In individuals with weakened immune systems, Acyclovir can cause thrombotic thrombocytopenic purpose and hemolytic uremic syndrome serious conditions involving blood clots. Allergic reactions: These can be mild (rash, itching) or serious (difficulty breathing, swelling of face/throat), according to Medical News Today. Important [verse] Report any unusual or severe side effects to your doctor immediately. Individuals with pre-existing conditions like kidney disease or a weak immune system should discuss their health history with their doctor before starting herpes medication. Always take herpes medication as prescribed by your doctor and discuss any concerns about side effects. [outro] This information is for general knowledge and should not replace professional medical advice. Always consult with a healthcare professional for diagnosis and treatment of any medical condition.