As an STD assistant, I understand your concern regarding the proper dosage and timing for taking acyclovir to treat herpes. Acyclovir is an antiviral medication commonly prescribed to manage herpes outbreaks.

For the standard dosage of acyclovir 800mg twice daily for 5 days:

- You should take one 800mg tablet in the morning and another 800mg tablet 12 hours later in the evening.
- It's important to space out the two doses evenly, about 12 hours apart, to maintain consistent levels of the medication in your system.
- Continue this dosing schedule for the full 5-day course as prescribed by your healthcare provider.

However, I would advise you to double-check the specific instructions provided by your doctor or pharmacist, as dosages can vary based on individual circumstances. It's crucial to take acyclovir exactly as directed for maximum effectiveness in managing herpes outbreaks.

If you have any other questions or need further clarification, please consult your healthcare provider or pharmacist directly. They can provide personalized guidance based on your specific condition and medical history.

Remember, while I can provide general information, you should always follow the advice of medical professionals for your personal treatment plan.