Costs of Weight Loss Medications

Most Weight Loss/Anti-Obesity Medications are not PBS listed and carry a significant cost. Please see below for a guide on the costs of both oral and injectable weight loss medications.


Oral Tablets:

Duromine (Phentermine)

  • $90–$170 per month
  • $1,080–$2,040 per year


Contrave (Naltrexone/Bupropion)

  • $249 per month
  • $2,988 per year


Topamax (Topiramate)

  • $10–$23 per month
  • $60–$141 per year


Injectable Medications:

Mounjaro (Tirzepatide)

  • $285–$719 per month
  • $3,420–$8,628 per year


Wegovy (Semaglutide)

  • $260–$645 per month
  • $3,120–$7,740 per year


Ozempic (Semaglutide)

  • $130–$200 per month
  • $1,560–$2,400 per year


Saxenda (Liraglutide)

  • $400 per month
  • $4,800 per year


Trulicity (Dulaglutide)

  • $150 per month
  • $1,800 per year


Weight Loss Medications Dosage and Cost in Australia

Oral Medication Dose Trial Duration %TWL PBS Subsidy Estimated Cost (Private) Annual Cost (Private) Trial
Duromine 15mg - 30mg 12 weeks 5% - 10% No $90 - $170 $1,080 - $2,040 Kang et al 2010
Contrave 8mg/90mg 56 weeks 5.4% No $249 $2,988 Greenway et al 2010
Topamax No $15 - $31 $180 - $372
Mounjaro 5mg, 10mg, 15mg 72 weeks 15%, 19.5%, 20.9% No $285 - $719/month $3,420 - $8,628 Surmount
Wegovy 2.4mg 68 weeks 14.9% - 18.5% No $345 - $645/month $4,140 - $7,740 Step 1,3,4,8
Ozempic 1.0mg 40 weeks 6.5% No, Type 2 Diabetes Mellitus only $130 - $200/month $1,560 - $2,400 Sustain 7
Saxenda 3.0mg 68 weeks 6.6% No $400 $4,800 Step 8, Scale
Trulicity 1.5mg 40 weeks 3% No, Type 2 Diabetes Mellitus Only $150 $1,800 Sustain 7