GLP-1 Starter Kit · Updated 11 May 2026

GLP-1 Starter Kit Australia: Week-by-Week First Month Expectations (2026)

Starting GLP-1 medication is straightforward — but the first month is when most patients drop out due to side effects, not lack of efficacy. This is a practical week-by-week guide to navigating month 1: what to eat, when to call your GP, when to push through, and what red flags warrant emergency care. Cuts through the marketing copy + tells you the truth about the adjustment period.

The Health Desk · Editorial team, aged care + dental + plastic surgery + dermatology + weight-loss + psychology · Updated 14 May 2026 · How we rank · Editorial standards

Key takeaways

  • First month: 2-4kg average weight loss. Strongest side effects in week 1, improving from week 2 onwards.
  • Eat small, frequent, protein-prioritised meals. Avoid alcohol + heavy/fatty foods in weeks 1-2.
  • Resistance training 2-3x/week + 1g/kg protein critical for muscle preservation during rapid loss.
  • Standard dose escalation at week 4. GP check-in at this point to review side effects + weight.
  • When to call GP: vomiting >2x/day for 3+ days, severe abdominal pain, persistent low mood. ED: pancreatitis-like pain (severe upper abdominal radiating to back).
Week-by-week: what to expect · Click any header to sort
Provider What to expect Diet adjustments Watch for
Day 1-3 Mild nausea + appetite drop within hours of first injectionDrink water steadily; eat small bland meals if hungryNo fast food, no alcohol — both amplify nausea
Week 1 Strongest side-effect window — nausea + occasional vomiting in 30-40% of patients3-4 small meals; soda water + ginger + electrolyte drinksConstipation may start — fibre + 2.5L water daily
Week 2 Body adjusting; nausea typically improving 50% from week 1Reintroduce slightly larger meals; protein priorityEnergy may dip — adjust workout intensity
Week 3 Baseline of new normal forming. Reduced food cravings noticeableTrack meals + water in app; lock in protein 1g/kg targetConstipation often peaks; fibre + magnesium supplement helps
Week 4 Dose escalation typically scheduled (e.g. Ozempic 0.25 → 0.5)GP check-in: review side effects, weight, moodHydration + protein routine should now be automatic
Weeks 5-12 Weight loss accelerates as you tolerate higher dosesEstablish exercise routine — muscle preservation is criticalWatch for mood / gallbladder symptoms / severe abdominal pain

Individual experience varies — some patients sail through week 1 with minimal side effects; others have a tough first month. Persistence + protocol matter more than perfect tolerance.

Symptom triage — when to push through vs call your GP · Click any header to sort
Provider Frequency Action Notes
Mild nausea (no vomiting) CommonPush through — small bland meals + waterTell GP if severe at week 3+
Vomiting >2x/day for >3 days Less commonCall GP — dose may need pausingRisk of dehydration + electrolyte imbalance
Constipation Very commonFibre supplement + 2.5L water + magnesiumTell GP if no bowel motion 5+ days
Severe upper-right abdominal pain Uncommon but seriousCALL GP IMMEDIATELY — possible gallbladderMay require ED if severe + persistent
Severe pancreatitis-like pain (severe upper abdominal radiating to back) Rare but seriousED immediatelyPancreatitis is a known rare GLP-1 risk
Mood changes / depression Uncommon but reportedTell GP — switch options existGLP-1 mood effects vary by individual
No appetite at all Common but problematicForce-eat small meals — muscle loss riskTell GP if losing muscle mass or feeling weak
Hair shedding (week 8-12) Common with rapid weight lossIncrease protein + iron + zincUsually resolves within 6 months

When in doubt — call your GP. Rare serious complications (pancreatitis, gallbladder events) are real but uncommon.

The protein + hydration foundation

If you remember nothing else from this guide, remember:

  • Protein target: 1.0-1.2g per kg body weight per day. For an 80kg person: 80-96g protein daily. Sources: chicken breast (~30g/100g), Greek yoghurt (~10g/100g), eggs (~6g each), tinned tuna (~25g/can), protein powder (~25g/scoop).
  • Hydration target: 2-2.5L water daily. Spread across the day; not in one go. Electrolyte tabs (1-2 tabs daily) help avoid hyponatraemia + constipation.
  • Resistance training 2-3x/week. Bodyweight + light dumbbells initially. Progressive overload over 12 weeks. Muscle is what makes you healthy long-term, not the weight number alone.
  • Magnesium supplementation. 200-400mg daily — helps with constipation + cramping during rapid weight loss.
  • Vitamin D + B12 testing at 3 months. Common deficiencies with reduced food intake.

Your injection technique matters

Most clinics include a brief training but here\'s the summary:

  • Rotate sites weekly: abdomen (avoid 5cm around navel), upper outer thigh, upper outer arm
  • Pinch skin loosely, insert at 90° for thigh + arm, 45° for abdomen if you\'re lean
  • Hold for 6 seconds before removing — ensures full dose delivery
  • Keep unused pens refrigerated (2-8°C); current pen can stay at room temp for up to 28 days after first use
  • Don\'t inject into bruises, scars, or stretched skin

If your injection is consistently painful or bruises, you may be injecting into muscle rather than fat — adjust your angle + pinch technique.

When to call vs when to go to ED

Call GP within 24-48 hours:

  • Vomiting 2+ times per day for more than 3 days
  • No bowel motion for 5+ days despite fibre + water
  • Persistent dizziness / lightheadedness (could be dehydration)
  • Mood low for several days with no obvious external cause
  • Unexpected weight loss faster than 1.5kg per week (could indicate inadequate intake)

Go to ED immediately:

  • Severe upper abdominal pain radiating to back (pancreatitis-like)
  • Severe upper-right abdominal pain after eating (gallbladder)
  • Vomiting blood
  • Severe headache with vision changes
  • Chest pain
  • Suicidal thoughts

Tracking what matters

Most patients track weight obsessively + forget the important inputs. Build these habits in month 1:

  • Daily weight: same time, after toilet, no clothes. Track weekly average — daily fluctuations are noise.
  • Daily water intake: log in app or with stickers on a 2L bottle.
  • Daily protein intake: rough estimate is fine. Most weight-loss apps (MyFitnessPal, Cronometer) calculate automatically.
  • Daily energy / mood: 1-10 scale, brief note. Catches early problems.
  • Resistance training sessions per week: exercises + sets + reps + weight.
  • Side effect diary: nausea level, bowel function, any unusual symptoms. Useful for GP check-ins.

Common questions

How quickly will I lose weight in the first month?

Average: 2-4kg in the first month at starting dose. Some patients lose 5-6kg, others lose only 1-2kg. The first month is largely about adjusting to the medication + reducing food intake — major weight loss accelerates from month 2-3 onwards as you tolerate higher doses. Don\'t panic if month 1 results are modest — sustained 6-month + 12-month loss is what matters. Average 12-month weight loss: ~15% body weight on Wegovy, ~21% on Mounjaro.

Will the nausea pass?

For most patients — yes, by week 3-4. Strategies that help: (a) smaller meals more frequently rather than 3 big meals, (b) bland foods (toast, rice, chicken) over rich + fatty foods, (c) ginger tea or ginger lollies, (d) avoid alcohol entirely in the first 2-3 weeks, (e) hydrate steadily (sipping vs gulping). Severe persistent nausea past week 4 is unusual — discuss with your GP about dose adjustment or switch.

Can I drink alcohol on GLP-1?

Technically yes, but practically problematic in the first 2-4 weeks. GLP-1 slows gastric emptying, so alcohol absorbs differently — you may feel drunk faster + sicker the next day. Many patients also find their tolerance is reduced (1 drink feels like 3). After week 4-6, most patients can resume moderate alcohol consumption but report greatly reduced cravings + tolerance. Some research suggests GLP-1 medications reduce alcohol cravings systemically — an unexpected secondary benefit for some patients.

What should I eat in the first week?

Small, frequent, simple meals. Prioritise protein (chicken breast, fish, Greek yoghurt, eggs, protein powder). Avoid: heavy carbs (pasta, rice, bread in large portions), greasy foods (fried, fatty meats), spicy foods, alcohol. Many patients find these initially nauseating: dairy, beef, onions, garlic — try a smaller portion first to test tolerance. Hydrate well (2-2.5L water + electrolytes). Listen to your body — if a food makes you nauseous, skip it that week + retry later.

Do I need to exercise?

Strongly recommended — but not for weight loss; for muscle preservation. GLP-1 weight loss is fast + about 25-30% of lost weight is muscle if you don\'t exercise. With resistance training 2-3x/week + adequate protein (1-1.2g/kg body weight), muscle loss drops to 15-20%. Cardio is fine but resistance training (weights, body weight) is the critical input. Start with bodyweight + light dumbbell routine; intensity is less important than consistency in the first 3 months.

When does dose escalation happen?

Standard schedule: Ozempic week 0.25mg start, escalate to 0.5mg at week 4, then 1.0mg at week 8, optionally 2.0mg at week 16. Wegovy: 0.25mg → 0.5mg → 1.0mg → 1.7mg → 2.4mg over 16 weeks. Mounjaro: 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg over 20 weeks. Saxenda escalates daily over 5 weeks. Escalation is paced to manage side effects — going faster increases nausea risk; going slower delays full efficacy.

Can I stop GLP-1 once I reach my goal weight?

Most patients regain 60-80% of lost weight within 12-24 months of stopping (STEP-1 trial data + real-world studies). GLP-1 medications are increasingly viewed as long-term obesity management, similar to blood pressure medication for hypertension. Some patients reduce to maintenance doses (e.g. monthly half-dose) rather than stopping entirely. Stopping abruptly without behaviour change typically results in regain. Discuss long-term strategy with your GP — there\'s no single "right" answer.

What about hair shedding?

Common with rapid weight loss — affects ~10-20% of GLP-1 patients, typically peaking weeks 8-16. Driver: rapid caloric restriction + sometimes protein deficiency, not the medication itself. Mitigation: maintain 1-1.2g protein per kg body weight, ensure adequate iron (especially women), zinc, biotin, vitamin D. Most hair regrows within 4-6 months as your body adjusts. Talk to your GP if hair loss is severe or persistent past 6 months — could indicate other deficiency.

Should I expect mood changes?

Most patients report neutral or mild mood improvements (lower appetite-related anxiety, weight loss psychological benefit). A minority report low mood / anxiety / depression — uncommon but documented. The FDA has not added a black-box warning for GLP-1 + mood, but it\'s a known signal. If you notice persistent low mood, hopelessness, or suicidal ideation — STOP the medication + see your GP immediately. Mood symptoms typically resolve within 2-4 weeks of discontinuation.

What\'s the difference between starting GLP-1 via GP vs telehealth?

GP: in-person assessment, full medical history review, ongoing GP relationship for issues, script for retail pharmacy. Telehealth (Juniper, Pilot, Mosh, Eucalyptus): online questionnaire + video consult, medication delivered, coaching included. GP is generally preferred if you have complex medical history, pregnancy potential, mental health conditions, or want long-term continuity. Telehealth is convenient + bundled-cost effective for healthy adults focused on weight loss. Both produce similar weight outcomes in trials — the difference is mostly experience + support model.

Next step

For drug-by-drug cost + supply info, use our switch cost calculator + supply tracker. For PBS eligibility, run our PBS Authority decision tree.