Procedure prep
Fasting Before a Vasectomy
A vasectomy is a quick procedure for permanent male contraception. The great majority are done under local anesthetic only — which means many men don't need to fast at all. The deciding factor is your anesthesia type.
Fasting for this procedure
→ Get your exact fasting times with the calculator
Medicines to check
- Blood thinners and aspirin — these raise the risk of bruising/bleeding (scrotal hematoma); ask whether to pause them and for how long. See medications to stop.
- Anti-inflammatories (ibuprofen) — ask whether to avoid them just before, as they can add to bruising.
- Blood pressure and regular medicines — usually continued; confirm.
When this surgery may be delayed
- A skin infection or rash in the groin/scrotal area
- Fever or feeling unwell
- If having sedation: you ate or drank outside your fasting window
Reports & documents to carry
- Photo ID and any consent or referral paperwork
- Tight supportive underwear or a jockstrap to wear afterward
- Someone to drive you if you're having sedation
What to ask your anesthesia team
- Is my vasectomy under local anesthetic only, or sedation/general?
- If it's local only, can I eat normally and drive myself home?
- Should I pause aspirin, blood thinners, or ibuprofen first?
- How long until the vasectomy is reliable (and a follow-up sperm test)?
Your prep checklist
Tick things off as you sort them — saved on this device only, nothing is sent anywhere.
A general guide — your hospital's own instructions always come first.
Frequently asked questions
Do I have to fast before a vasectomy?
Usually not. Most vasectomies are done under local anesthetic only, and many clinics actually suggest a normal light meal beforehand so you don't feel lightheaded. You only need to fast if you've chosen sedation or general anesthesia.
Can I drive myself home after a vasectomy?
If it was done under local anesthetic only, many men can drive themselves — though it's more comfortable to have a lift. If you had sedation or general anesthesia, you must not drive and need a responsible adult with you.
Should I stop aspirin or ibuprofen before a vasectomy?
Blood thinners, aspirin and anti-inflammatories can increase bruising and the risk of a scrotal hematoma. Ask your doctor whether to pause them and for how long — don't stop prescribed blood thinners without advice.