The flip is the worst part. You finish your last night shift — seven AM, Thursday morning — and by Friday evening you're supposed to be back on a day schedule because your daughter has a Saturday morning basketball game and your four-year-old doesn't understand why Mommy sleeps when the sun is up. So you force it. You stay awake Thursday on four hours of sleep and caffeine timed to the hour, you crash Thursday night at nine PM like a normal person, and by Friday your circadian rhythm is a suggestion your body has decided to ignore.
That's when the aura starts. Friday afternoon, almost always. The shimmer in my left visual field, like heat rising off asphalt, except it's January in Fargo and nothing is warm. I know exactly what's coming. I've known since I was twenty years old, sitting in a NDSU lecture hall, watching the left side of a PowerPoint slide dissolve into light.
Rotating shift work is a documented migraine trigger. My neurologist explained it like this: your brain wants predictability, and you're giving it the opposite. Disrupted sleep, irregular meals, cortisol swinging like a pendulum, fluorescent lighting for twelve hours at a stretch. Every shift flip is a trigger, and the schedule guarantees a flip every week.
For years I managed with the standard protocol. Rizatriptan 10 milligrams at aura onset, then a dark room, then hope. The rizatriptan compressed the headache from twelve hours to four, which sounds like a victory until you account for the aftermath — the heaviness, the cognitive fog, the eighteen hours of thinking through wet sand. I'd lose my entire Friday and most of Saturday. My husband would handle meals and bedtime and I'd surface on Sunday feeling like I'd been reassembled from spare parts.
My neurologist added Aimovig in 2020 — a CGRP inhibitor, one injection a month, which brought the frequency down from three or four migraines a month to about two. Better. Real improvement. I'm still on it. But when a migraine breaks through the Aimovig, it breaks through hard, and the triptans still carry the same fog.
September 2021, I added a tool. Five milligrams of THC, sublingual tincture, taken at aura onset on days off with a minimum sixteen-hour buffer before my next shift. That buffer is my line. I don't negotiate it, I don't shorten it, I don't make exceptions. Sixteen hours. I track it the same way I track medication administration times at work — noted, documented, precise.
The results were not dramatic in the way pharmaceutical marketing wants things to be dramatic. The aura faded within forty minutes. The headache arrived at a three. I did not need a dark room. I did not lose Friday. I went to my daughter's soccer game and sat on a metal bleacher in the cold and watched her play, and I was there — present, not foggy, not calculating how many hours until I could function again.
I want to be specific about what cannabis does not do for me. It does not prevent migraines. The Aimovig does that, imperfectly. It does not replace triptans — when a migraine starts on a workday or the night before a shift, I take rizatriptan because that's what's appropriate and I am not going to use cannabis within my buffer window, period. Cannabis is not my primary treatment. It's a tool that works in a specific window, under specific conditions, with specific rules I follow with the same discipline I apply to every other controlled substance.
And here's the part that should be unremarkable but isn't. My hospital trusts me to push adenosine during a supraventricular tachycardia — a medication that briefly stops a patient's heart so it can restart in a normal rhythm. They trust me to titrate norepinephrine on a septic patient, adjusting micrograms per kilogram per minute while monitoring blood pressure every two minutes. They trust me to administer fentanyl — fentanyl — in the doses an attending orders for a trauma patient. That trust is not casual. It is earned through certification, demonstrated competence, and thirteen years of showing up and doing the work.
But five milligrams of THC, on my couch, on a Friday afternoon, thirty-six hours before my next shift — that's the thing I write about under a name that isn't mine.
I don't want a debate. I want a shift schedule that doesn't rewire my neurochemistry every week, and failing that, I want to use every legal tool available without performing shame about it. The tincture is on the same shelf as the rizatriptan. It should carry the same weight. The fact that it doesn't tells you something about the system, and it isn't telling you about me.