Atomoxetine vs atomoxetine hcl?

Short answer: They’re the same active drug, just in different chemical forms.

- Atomoxetine (the base) vs atomoxetine HCl (the hydrochloride salt)
- The active moiety is atomoxetine in both cases.
- The HCl form is a salt added to improve water solubility, stability, and manufacturability for oral meds.
- Most ADHD meds use atomoxetine hydrochloride in the tablet/capsule.

- Practical differences
- Dosing on product labels is usually in milligrams of atomoxetine hydrochloride (the salt).
- If you ever need to compare to “free base” atomoxetine, you’d have to adjust by the difference in molecular weights (the salt weighs more because of the added HCl). In practice, you follow the label, not the base amount.
- Therapeutic effect, mechanism, and safety are the same; the salt just changes formulation and absorption characteristics a bit.

- When you’ll see the naming
- Brand products (like Strattera) are listed as atomoxetine hydrochloride.
- Some references may refer to the “base” atomoxetine, but clinically available products contain the HCl salt.

If you’re looking at a prescription or label and want to know how to convert mg of atomoxetine HCl to the equivalent amount of the active base, I can help with the exact conversion if you share the labeled weights (the exact mg of the salt and the base).