Adipex vs. Trulicity

See how Adipex and Trulicity compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Adipex is a short-term daily stimulant pill for weight loss, while Trulicity is a once-weekly injection approved for long-term blood sugar control in type 2 diabetes.

  • Trulicity carries a boxed warning for thyroid C-cell tumors seen in animal studies, while Adipex is a Schedule IV controlled substance with its own abuse and cardiovascular risks.

  • Adipex is taken by mouth and costs far less per month, while Trulicity is injected weekly and typically costs several times more without insurance coverage.

Adipex vs. Trulicity Drug Summary

Adipex

Adipex (phentermine) is a sympathomimetic amine, a stimulant-class appetite suppressant approved for short-term weight loss alongside diet and exercise. It comes as an oral tablet or capsule taken once daily, sometimes split into two smaller doses. It is a Schedule IV controlled substance because of its potential for abuse.

Trulicity

Trulicity (dulaglutide) is a GLP-1 receptor agonist approved for blood sugar control in type 2 diabetes and for lowering cardiovascular risk in people with heart disease or multiple risk factors. It is given as a once-weekly subcutaneous injection using a prefilled pen. Doctors also prescribe it off-label for weight loss in people without diabetes.

Adipex vs. Trulicity Side Effects

Adipex

Most common
Insomnia (not specified)
Dizziness (not specified)
Dry mouth (not specified)
Restlessness (not specified)

Trulicity

Most common
Nausea (up to 21.1%)
Diarrhea (up to 13%)
Vomiting (up to 13%)
Abdominal pain (up to 13%)

Adipex vs. Trulicity Dosage

Adipex

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 18.75 mg once daily At the start
Maximum dose 18.75 mg once daily Same as starting
Dose changes None Fixed dose

Trulicity

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 0.75 mg once weekly Weeks 1-4
Maximum dose 1.5 mg once weekly Week 5 onward
Dose changes 1 increase Every 4 weeks

Adipex vs. Trulicity Indications

Adipex

Adipex is approved only for short-term use, typically a few weeks, as an add-on to diet and exercise for weight loss in adults with obesity. It is not approved for long-term weight management or for patients 16 and younger. Doctors typically use it as an early, short-course option before considering other treatments.

  • Short-term (a few weeks) weight-loss aid

  • Used with diet and exercise, not alone

  • Not approved for long-term use

  • Not approved for patients 16 or younger

Trulicity

Trulicity is approved for improving blood sugar control in adults and children 10 and older with type 2 diabetes. It is also approved to lower the risk of major cardiovascular events in adults with type 2 diabetes who have heart disease or multiple risk factors. Some doctors prescribe it off-label for weight loss in people without diabetes.

  • Blood sugar control in type 2 diabetes

  • Approved for ages 10 and up

  • Lowers cardiovascular risk in at-risk adults

  • Off-label use for weight loss (no diabetes)

Adipex vs. Trulicity Pros and Cons

Adipex

Adipex is inexpensive, taken by mouth, and has decades of clinical use behind it, but it is only meant for short courses and carries cardiovascular and dependence risks. It is not a fit for anyone with heart disease, uncontrolled blood pressure, or a history of substance misuse.

Pros

  • Oral tablet, no injections needed

  • Much lower monthly cost, roughly $50 to $150

  • Long track record dating back to 1959

Cons

  • Only approved for short-term use

  • Controlled substance with abuse potential

  • Not for people with heart disease or hypertension

Trulicity

Trulicity offers long-term blood sugar control and a cardiovascular benefit with a once-weekly injection, but it carries a boxed warning for thyroid tumors and a much higher price tag. It is not appropriate for anyone with a personal or family history of certain thyroid cancers.

Pros

  • Approved for long-term, ongoing use

  • Once-weekly dosing instead of daily

  • Also reduces cardiovascular risk

Cons

  • Boxed warning for thyroid C-cell tumors

  • Much higher monthly cost, roughly $987 to $1,065

  • Requires injection instead of a pill

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