What does “stop acyclovir after 70” mean?
It depends on what you mean by “after 70”:
- After you’ve had symptoms for 70 hours/days (sometimes people mean “after 3 days” but say 70 by mistake).
- After age 70 (asking whether age changes how long you should take it).
- After 70 tablets/doses (a fixed course you were prescribed).
Acyclovir isn’t usually prescribed with a single universal cutoff like “stop at 70.” The correct stop date depends on the reason you’re taking it (cold sores, genital herpes, shingles, chickenpox, suppression vs treatment) and your prescribed regimen.
Can you stop acyclovir just because you hit day/age 70?
For most uses, you should not stop early just because of a number like “70”. Stopping before the course is finished can lead to:
- Symptoms coming back sooner or lasting longer (especially for shingles or an initial outbreak).
- More viral activity during the time it’s meant to reduce shedding and complications.
- Worse outcomes in higher-risk patients (for example, people with weak immune systems).
Age alone (being over 70) is not typically the deciding factor. Clinicians adjust dosing based on things like kidney function and the indication, not simply age.
If you were told to take it for a certain course, when is it safe to stop?
In general, the “safe to stop” point is when you’ve taken it for the duration your prescriber wrote—commonly:
- Short courses for active infections (for example, outbreaks or shingles).
- Longer or ongoing use for suppression of recurrent herpes (where stopping may allow recurrences to return).
If you tell me which condition you’re treating and the exact instructions on your prescription label (dose and how many days), I can help you interpret what the plan likely means.
What if you missed doses or want to stop early because of side effects?
If you’re thinking about stopping because of side effects (common concerns include nausea, headache, or, less commonly, kidney-related issues), don’t decide on your own—contact your prescriber. Some problems require:
- adjusting the dose (especially if kidney function is reduced), or
- switching to a different plan.
Stopping abruptly is not usually the first step unless your clinician tells you to.
When should older adults be extra careful with acyclovir?
People over 70 often have a higher chance of reduced kidney function, and acyclovir dosing can need adjustment to avoid complications. That’s one reason you shouldn’t change the schedule without checking with your clinician or pharmacist.
Quick check: what should you do right now?
- If your prescription says “take for X days,” don’t stop early just because it’s near 70.
- If you meant you’re on day 70 of treatment, ask your prescriber whether you’re on treatment (active infection) or suppression (ongoing prevention), since the stopping rules differ.
- If you’re having concerning symptoms (severe weakness, confusion, very low urine output, rash with swelling, or signs of allergy), seek urgent medical advice.
Tell me these 3 details and I’ll give a more precise answer
1) What are you taking acyclovir for (cold sores, genital herpes, shingles, chickenpox, suppression)?
2) What dose and directions are on the label (e.g., 400 mg three times daily for __ days)?
3) Do you mean “after 70” as in days, doses, or age?