PRE-OP PREP · 7-MIN READ · UPDATED MAY 2026
Bariatric Surgery in Mexico: Your Complete Pre-Op Checklist
From medical clearance to packing list — exactly what to do in the 30 days before your bariatric surgery in Mexico.
By Dr. Alejandro López, MD · Bariatric Surgeon · Tijuana · Guadalajara · Puerto Vallarta
The Short Version
- Start prep 30 days before surgery — not optional, every day matters.
- Liver-shrinking diet starts 2 weeks pre-op (high-protein, low-carb).
- Required: lab tests, cardiology clearance, dental check, optional psych eval.
- Stop smoking 4+ weeks pre-op — nicotine impairs healing significantly.
- Pack smart: comfortable clothes, electrolytes, vitamins, walking shoes, English/Spanish phrasebook.
Most bariatric surgery complications happen because patients showed up unprepared. The 30 days before surgery are when you set yourself up for a safe procedure and fast recovery — or for a surgery that gets converted to open, postponed in the OR, or worse.
This checklist is the same one we send every ALO patient. Follow it — not selectively, completely. If something doesn’t apply to you, your coordinator will tell you. If you skip something, surgery day will tell you.
Your 30-Day Pre-Op Countdown
Phase 1 of 5
30 days out: medical clearance + prep
Schedule your lab work (CBC, CMP, HbA1c, lipid panel, vitamin D, B12, iron, TSH). Cardiology clearance if you’re over 50 or have known heart issues. Dental check — resolve any cavities or infections (bariatric anesthesia + active dental infection = bad combo). Stop smoking (nicotine impairs healing and raises blood-clot risk).
Phase 2 of 5
14 days out: liver-shrinking diet begins
High-protein, low-carb. 60–80g protein/day, <50g carbs/day. Replaces one meal with a whey-isolate shake. Cuts liver size 15–25% — critical for safe laparoscopic access. See our companion article: what happens if you don’t follow the pre-op diet.
Phase 3 of 5
7 days out: final tests + logistics
Confirm flight and hotel arrangements (we handle this for ALO patients). Send all medical records to our coordinator. Pre-pack vitamins, electrolytes, and clothes. Talk to your manager/family about recovery time off. Stop all NSAIDs (ibuprofen, naproxen) — they raise bleeding risk.
Phase 4 of 5
3 days out: clear liquids + travel
Switch to clear liquid diet (water, broth, sugar-free Jello, decaf tea, electrolyte drinks). No solid food. Travel day: light snacks of allowed liquids only. Bring your medical records, passport, comfortable clothes, electrolyte powder, walking shoes. Our team picks you up at the airport.
Phase 5 of 5
Surgery day: arrival + procedure
You’ll fast from midnight before surgery. Arrive at the hospital early morning. Brief evaluation with the anesthesiologist and surgeon. Surgery typically lasts 60–90 minutes. You wake up in recovery, walk within 4–6 hours, eat liquid by evening. Hospital stay: 1–2 nights.
What to Pack for Bariatric Surgery in Mexico
- Loose, comfortable clothing — nothing tight at the waist. Sweatpants, button-front shirts.
- Walking shoes — you’ll walk a lot post-op. Slip-ons are ideal.
- Electrolyte powders — Liquid IV, LMNT, or Pedialyte packets. Critical for hydration.
- Protein shakes — bring 5–7 days’ worth in case hotel options are limited.
- Bariatric multivitamins — start day 1 post-op. See our supplement guide.
- Medical records — printed + digital backup. Surgeon needs your latest labs.
- Passport + 2 forms of ID — one stays at the hospital.
- USB charger + extension cord — Mexican outlets are standard US-type.
- Light entertainment — books, headphones, downloads (you’ll rest a lot).
- Small phrasebook or translation app — staff speaks English but useful in restaurants.
📌 What NOT to Do Before Surgery
Don’t skip the pre-op diet — the #1 reason surgeries get converted to open or postponed. Don’t drink alcohol in the last 7 days — it interferes with anesthesia and healing. Don’t take NSAIDs (Advil, Aleve) in the last 7 days — they raise bleeding risk. Don’t arrive jet-lagged and dehydrated — rest the night before, hydrate aggressively.
Documents Your Coordinator Needs
- Recent lab results (within 60 days)
- Cardiology clearance letter (if applicable)
- List of current medications + doses
- List of allergies (drug, food, environmental)
- Previous surgical history
- Photo ID and passport scan
- Emergency contact information
- Insurance card (for HSA/FSA reimbursement, if applicable)
All documents can be sent via secure WhatsApp or email at least 7 days before travel.
Ready to start your 30-day countdown?
Book a free consult and our coordinator will send you the complete pre-op packet, schedule your labs, and answer every prep question.
Frequently Asked Questions
Do I need to lose weight before surgery?
Yes — the pre-op liver-shrinking diet (2 weeks, high-protein/low-carb) shrinks your liver 15–25% to allow safer laparoscopic access. Some patients also lose 5–10 lbs of water weight, which helps anesthesia and recovery.
What if I’m a smoker?
You need to stop at least 4 weeks before surgery. Nicotine impairs blood vessel function, raises blood-clot risk, slows wound healing, and increases lung complications under anesthesia. Vaping counts. Nicotine patches are also a problem.
Can I take my regular medications?
Continue most chronic medications (blood pressure, diabetes, thyroid). Stop NSAIDs (ibuprofen, naproxen, aspirin) 7 days pre-op. Stop blood thinners per your prescriber’s guidance. Your coordinator will give specific instructions for your meds list.
What about Ozempic, Wegovy, or Mounjaro?
Stop GLP-1 medications 7–14 days before surgery — they slow stomach emptying and can complicate anesthesia. Your coordinator will give exact stop dates based on your specific drug and dosage.
Do I need a passport for Mexico?
Yes for US citizens flying. Driver’s license alone doesn’t work for international flights. Canadians also need a valid passport. Apply 6+ weeks in advance if you don’t have one.
How much hand luggage should I bring?
Pack light. A medium-size suitcase is enough. We provide a recovery bag at the hotel with the bariatric essentials. Don’t over-pack — you won’t need much beyond the basics.
Can my spouse or family come with me?
Yes — encouraged. Companion packages include hotel, meals, and transport. Most patients bring a spouse, parent, or close friend. See our medical tourism guide.
One last thing
The 30 days before surgery are the difference between a smooth procedure and a complicated one. This checklist isn’t bureaucratic — every item exists because patients have learned the hard way what happens when they skip it.
Next steps: confirm your eligibility, review surgical risks, and read about post-op nutrition (which starts day 1).