PetDose / Logs / Heartworm prevention log
Heartworm prevention schedule and log
A one-page log for tracking heartworm prevention, with a row for every month of the year. Write down the date the medication was due, the date it was actually given, and who gave it. It holds dates only. Your vet decides which product your pet takes, when it is due, and whether any test is needed, so the sheet has no product amounts and no instructions of its own.
Heartworm prevention log
Your vet sets the schedule. Copy due dates from your vet's instructions or the package. This sheet only records when each one was given.
| Month | Date due | Date given | Given by | Notes |
|---|---|---|---|---|
| January | ||||
| February | ||||
| March | ||||
| April | ||||
| May | ||||
| June | ||||
| July | ||||
| August | ||||
| September | ||||
| October | ||||
| November | ||||
| December |
How to use this sheet
Fill in the top of the page once, using the product name exactly as it appears on the label. At the start of the year, write the date due for each month, copying it from your vet's instructions or from the reminder on the package. When the medication is given, write the date and your initials in that row. If it is given late, write the real date, not the date it was supposed to happen. The record is only useful if it is honest.
Why dates only
With a medication that is not given every day, the question is rarely "how much" and almost always "when was the last one?" A row with a date answers it. An empty Date given box next to a date that has passed is easy to spot, which is the whole point of a monthly grid. Your vet may also ask when the last one was given, and a written date is better than a guess.
Keep other regular items in the notes
If your pet has other preventives on their own schedule, such as flea and tick treatments, write them in the notes column on the day they are given, or keep a second sheet. If you are tracking several pets, print one sheet for each so nothing gets mixed up, or use the weekly medication chart for pills and drops that happen more often.
What to do when a month is missed
Write "missed" in the notes and the date you noticed. Then call your vet's office and ask what to do. Do not decide on your own how to catch up. Your vet knows the product and your pet, and a written log makes the phone call short: you can read out the last date given and the date it was due.
Common questions
Which product should I write in the box at the top?
Whatever your vet prescribed, written as it appears on the label. This page does not recommend or compare products.
Can one sheet cover more than one pet?
It is easiest with one sheet per pet. The dates and initials stay clear, and you can hand each pet's sheet to the vet separately.
What are the test date boxes for?
They are for dates your vet gives you. Copy them from your vet's records, and ask at your next visit if you are not sure when the next one is.
About this template
Print it as often as you like. Leave anything you do not need blank. Fill in the top fields by hand once, then copy the sheet for later weeks.
Read the matching guide: How to keep a medication log for your pet.
More free printables
- Printable pet vaccination record
- Printable pet medication chart
- Free printable vet visit checklist
- Free printable pet medication log
Keep it on your phone with PetDose
Monthly medicines are easy to forget because they are not part of the daily routine. PetDose is a free pet medication tracker that shows what is done and who did it, on one iPhone. It also shows what is due, warns you before a second dose, and sends a reminder only when something is overdue. Free to track, no account, and everything stays on your phone. Pro adds full history and a vet visit report you can send or print.
General information, not veterinary advice. Ask your vet about your pet's care.