The tirzepatide complete guide: every Panya post on Mounjaro / Zepbound, organized

The Panya inbox has been mostly tirzepatide questions for two years. The blog has accumulated about fifty posts touching the molecule from different angles, and the question I get most often now is some version of: where do I start.

This is that index. Every Panya tirzepatide post, grouped by the actual question you're probably trying to answer, with the one or two most useful posts surfaced first. If you only have ten minutes, read the bolded one in your section.

You are thinking about starting

You probably want to know what you're getting into before you commit to a prescription.

The post that gets read most in this stretch is the first 14 days on tirzepatide. It walks the day-by-day timeline: what hour you'll first feel something, when the appetite quiet shows up, when the nausea peaks if it shows up at all, when constipation emerges (later than people think), and what week-two should feel like.

If you want the broader side-effect picture before you start, the real side effects list is the version that's longer than the FDA insert but shorter than the WebMD scroll. What to ask your doctor before Mounjaro covers the conversation most people don't have at the prescription appointment.

For the dose ramp itself, tirzepatide titration mistakes lists the four most common errors I see in reader email, and the tirzepatide dosage protocol is the version most US clinics use today.

You're trying to decide between brand and compounded

This is the most active decision space in the catalog and the framing has shifted three times in the last year.

The short version is the compounded vs brand decision in 90 seconds. The long version is compounded tirzepatide vs brand Mounjaro: what is actually different.

If you're in the US specifically, after the FDA crackdown on US compounded covers what's still available, what isn't, and how the licensed 503A path works as of mid-2026. What to ask a clinic before you buy compounded peptides is the six-question vetting script for the intake call.

If you want the deeper trust framework, how to read a peptide Certificate of Analysis explains what a real COA shows and what's missing when one is faked.

You're shopping by region

Cost varies by 5x across regions. Supply state varies by quarter. Picking the right region for your situation is often more impactful than picking the right vendor within a region.

The US: US GLP-1 telehealth May 2026 is the snapshot.

Bangkok / Thailand: the Bangkok GLP-1 expat playbook for the strategy. Tirzepatide Thailand honest guide and Wegovy / Mounjaro / Zepbound in Bangkok 2026 for specific routes. Tirzepatide Bangkok price 2026 for the pricing spread.

Singapore: Singapore GLP-1 buyer's guide 2026 for routes, Singapore May 2026 update for current state.

UK: UK GLP-1 buyer's guide for the NHS-vs-private decision tree, May 2026 NHS update for the latest.

Australia + New Zealand: Australia GLP-1 buyer's guide May 2026 for the structurally cleaner Aussie market, New Zealand May 2026 update for the parallel.

Vietnam, Bali, UAE, Hong Kong: Vietnam, Bali, UAE, Hong Kong.

For a global price comparison, tirzepatide cost global 2026 ranks the current spread.

You're already on it and have questions

This is where the catalog has the most depth, because this is where most reader email comes from.

Plateau: the plateau at month six argues against the dose-escalation reflex most clinics push. Most readers should hold dose, not climb.

Alcohol: tirzepatide and alcohol covers the two real interactions and the third one most coverage misses. The GLP-1 alcohol 2026 update has the latest reduction data.

Birth control: tirzepatide and birth control covers the post-TGA-2025 contraception advisory and the seven-day window that matters.

Pregnancy: tirzepatide and pregnancy. The current guidance is unambiguous, the timeline question is more nuanced than the headline.

Hair loss: tirzepatide and hair loss puts telogen effluvium in context and lists what to actually do about it.

Gallbladder: tirzepatide and gallbladder on the prophylactic conversation that doesn't happen at clinic visits and the fat-intake counterintuitive prevention.

Fasting: tirzepatide and fasting on why the stack is less synergistic than people assume.

Workouts: GLP-1 and morning workouts on what the drug does directly versus what the calorie deficit does.

Muscle loss: tirzepatide muscle loss + protein resistance on the under-emphasized mechanism behind why protein targets need to climb on the drug.

Insurance: insurance might cover Wegovy not Mounjaro, insurance GLP-1 weight loss US.

You're thinking about stopping (or pausing)

This is the section the blog catalog underserves the field on. Most coverage is about how to start; the harder questions are about what happens when you stop or pause.

What you keep when you stop tirzepatide is the most-bookmarked post in the entire catalog. The honest read on the rebound problem.

The eight-week quit window covers the specific physiological window that's worth understanding. When to pause your GLP-1 covers the situations where pausing is medically appropriate (surgery, severe illness, certain procedures). Tirzepatide after stopping: what SURMOUNT-4 told us is the trial data on the rebound.

The maintenance dose no one explains is for people who want to taper without quitting. The second year on tirzepatide covers the long-haul trajectory.

You're comparing it to other GLP-1s

Semaglutide vs tirzepatide is the most-asked comparison; switching from semaglutide to tirzepatide is the post for people already on the former considering the move.

Tirzepatide vs semaglutide covers the same comparison from a different angle (decision-frame rather than mechanism).

For the next-generation context, retatrutide phase 3 update 2026, retatrutide explained, and semaglutide / tirzepatide / retatrutide 2026 cover where the class is heading.

For the longevity-adjacent debate, microdose GLP-1: what the trial data actually shows is the honest read on what's known and what isn't.

You're worried about counterfeits

How to spot a fake tirzepatide pen is the post most people should read at month two when the pen they got looks slightly different from the pen they got at month one. Reading a vendor website covers the patterns that separate a legitimate clinic from a flip operation.

Cold chain peptides is the technical version of why a vial that arrived warm should be replaced, not used.

What the science people are reading

The Attia / Huberman GLP-1 summary on what the two most-quoted longevity podcasters actually say (and what they don't). SURMOUNT-1 in plain English on the original tirzepatide weight-loss trial.

For the broader peptide context, the FDA horizon: six peptides 2026-2028 covers what's coming.

Where to go from here

If you're starting, read the first 14 days post and one regional buyer's guide.

If you're three months in and stalling, read the plateau post and the muscle loss post.

If you're thinking about stopping, read the post on what you keep when you stop. It's the most consequential decision in the entire user journey and it's the one most people make blindly.

If you're shopping for a clinic, the vendor scorecard catalog and the 11-signal rubric are where the molecule conversation ends and the supplier conversation begins.

The Panya catalog updates roughly weekly as new trial data lands or supply states shift. If something here is out of date or if you want to flag a clinic that's missing, email me at editor@panya.health and I'll usually have it patched the same week.

Common questions

How much weight loss can I expect on tirzepatide?

Trial averages show 18-25% body weight loss at 12 months on the full ramp. About 70-80% of weight loss is fat mass; 15-25% is lean mass. Your expected loss depends on starting BMI, dose tolerance, training consistency, and protein intake.

How long does it take to see results?

Most people notice appetite changes in the first week and measurable weight loss by week 4. The 5% threshold typically lands at month 2-3; the 10% threshold at month 5-7. The biggest gains are months 2-9; results plateau by month 12-15 for most people.

How do I switch from semaglutide to tirzepatide?

Skip one weekly semaglutide dose, then start tirzepatide at 2.5mg on the day you would have injected. The semaglutide tail covers the first week of tirzepatide ramp. Most patients land on tirzepatide 7.5mg as their long-term effective dose after switching from semaglutide 1mg.

Will I gain the weight back when I stop?

Some, almost certainly. SURMOUNT-4 showed average regain of 50-65% of lost weight by month 18 post-discontinuation. Variance is wide; people who maintained their food noise reduction and lean mass regain less.

How much does tirzepatide cost?

Varies by region. US private market: $400-1100/month brand Mounjaro. UK private: £200-550/month. Bangkok: 3,500-16,000 THB/month depending on tier. Insurance coverage is region-specific and brand-specific.