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.
★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).
| Provider ⇅ | What to expect ⇅ | Diet adjustments ⇅ | Watch for ⇅ |
|---|---|---|---|
| Day 1-3 | Mild nausea + appetite drop within hours of first injection | Drink water steadily; eat small bland meals if hungry | No fast food, no alcohol — both amplify nausea |
| Week 1 | Strongest side-effect window — nausea + occasional vomiting in 30-40% of patients | 3-4 small meals; soda water + ginger + electrolyte drinks | Constipation may start — fibre + 2.5L water daily |
| Week 2 | Body adjusting; nausea typically improving 50% from week 1 | Reintroduce slightly larger meals; protein priority | Energy may dip — adjust workout intensity |
| Week 3 | Baseline of new normal forming. Reduced food cravings noticeable | Track meals + water in app; lock in protein 1g/kg target | Constipation 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, mood | Hydration + protein routine should now be automatic |
| Weeks 5-12 | Weight loss accelerates as you tolerate higher doses | Establish exercise routine — muscle preservation is critical | Watch 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.
| Provider ⇅ | Frequency ⇅ | Action ⇅ | Notes ⇅ |
|---|---|---|---|
| Mild nausea (no vomiting) | Common | Push through — small bland meals + water | Tell GP if severe at week 3+ |
| Vomiting >2x/day for >3 days | Less common | Call GP — dose may need pausing | Risk of dehydration + electrolyte imbalance |
| Constipation | Very common | Fibre supplement + 2.5L water + magnesium | Tell GP if no bowel motion 5+ days |
| Severe upper-right abdominal pain | Uncommon but serious | CALL GP IMMEDIATELY — possible gallbladder | May require ED if severe + persistent |
| Severe pancreatitis-like pain (severe upper abdominal radiating to back) | Rare but serious | ED immediately | Pancreatitis is a known rare GLP-1 risk |
| Mood changes / depression | Uncommon but reported | Tell GP — switch options exist | GLP-1 mood effects vary by individual |
| No appetite at all | Common but problematic | Force-eat small meals — muscle loss risk | Tell GP if losing muscle mass or feeling weak |
| Hair shedding (week 8-12) | Common with rapid weight loss | Increase protein + iron + zinc | Usually 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.