Smoking and Nicotine Before Surgery

By Nick Peplow·Founder and editor

Last reviewed 12 September 2026· How this site is researched

Of all the pre-surgery requirements, the nicotine one is the least negotiable and the most likely to affect your result. Almost every surgeon requires you to stop smoking, vaping and all nicotine products for a set period before and after surgery, and many test for it. This page covers why, how long, what counts as nicotine, and what happens if you slip.

Why nicotine matters for these procedures

Nicotine is a vasoconstrictor: it narrows small blood vessels and reduces the blood supply to tissue. Smoking adds carbon monoxide, which reduces how much oxygen the blood can carry, and a range of other compounds that impair healing. Together they raise the risk of wound breakdown, infection, and tissue death in anything that depends on marginal blood supply.

For FTM procedures specifically, that means:

• Nipple grafts in top surgery. A free nipple graft has no blood supply of its own for the first few days; it survives by absorbing nutrients from the wound bed until new vessels grow in. Nicotine directly interferes with that. Partial or complete graft loss is the classic smoking complication in double incision top surgery. See Double Incision.
• Free flaps in phalloplasty. A radial forearm or anterolateral thigh flap is kept alive by a single artery and vein reconnected under the microscope. Vasoconstriction in those vessels can mean partial or total flap failure, which is the worst outcome in phalloplasty. Surgeons are stricter about nicotine here than anywhere else, and some want proof of three months or more.
• Urethral healing. Metoidioplasty and phalloplasty with urethral lengthening rely on a long suture line healing without leaks. Smoking is associated with higher rates of fistula and stricture.
• General wound healing and scarring. Wider, darker scars and slower closure of any incision, including hysterectomy ports and donor site grafts.
• Anaesthesia. Smokers have more airway reactivity and a higher rate of respiratory complications under general anaesthetic.

None of this is a moral judgement. It is a blood supply problem, and the surgeon cannot fix it in theatre.

How long you need to stop

Typical requirements, as of 2026, from surgeon consultation materials:

The "after" window is as important as the "before" and gets ignored more often. Grafts and flaps are at their most vulnerable in the first two weeks, and urethral healing continues for months.

Some surgeons phrase their requirement as "nicotine-free" and mean it absolutely. Others say "no smoking" and will accept nicotine replacement. Ask precisely.

What counts

• Cigarettes, cigars, pipe tobacco, shisha
• Vapes and e-cigarettes with any nicotine
• Nicotine pouches (snus-style) and chewing tobacco
• Nicotine patches, gum and lozenges, unless your surgeon has specifically approved them
• Cannabis smoked with tobacco; cannabis smoked on its own is a separate question, but most surgeons want you to stop smoking anything, and edibles have their own anaesthetic considerations, so disclose it

Testing

Many surgeons test, particularly for phalloplasty and for top surgery with nipple grafts. The common test is a urine or blood cotinine test; cotinine is the main metabolite of nicotine and stays detectable for several days after use (longer in heavy users). Some surgeons test at pre-op appointments, some on the morning of surgery, and some do both. A positive test on the day usually means surgery is cancelled and you lose the deposit or the theatre fee. Read your surgeon's policy so there are no surprises.

Nicotine replacement products will produce a positive cotinine test, which is why surgeons who allow them need to know you are using them.

Quitting with surgery as the deadline

A fixed surgery date is, for a lot of people, the thing that finally makes quitting stick. A few practical notes:

• Start earlier than the minimum. If the surgeon says six weeks, aim for ten, so a slip does not cost you the date.
• Ask about nicotine replacement before assuming it is banned. Some surgeons allow patches in the early weeks and require you to be off them for the last two to four weeks before surgery.
• Tell your surgeon if you have quit recently rather than pretending you never smoked. Recent quitters are treated differently from long-term smokers, and honesty means they can plan around it.

If you slip

Tell the surgeon. A single cigarette three weeks out is not the same as a pack a day, and the surgeon can decide whether to proceed, delay, or change technique (for example, switching from a nipple graft to a technique that keeps the nipple on a pedicle, though that has its own trade-offs). What you cannot fix is a flap failure caused by something you did not disclose. Surgeons have seen it all; the ones worth working with would rather know.

For the wider list of things surgeons ask you to do before a date, see Pre-Op Checklist, and for what nicotine-related complications look like when they happen, see Complications.