This site is for prescribers

Spencer's site serves clinicians. The dosing guides summarize approved labels, published studies, and reports of clinical practice for the people who prescribe.

Dosing decisions belong with the prescriber. A figure here is a reference point for a clinician's own judgment. It is not an instruction for you.

If you have a question about a medication, bring it to your clinician or pharmacist. They know your history, your labs, and what else you take.

This site cannot advise on personal use, and nothing on it is medical advice. If you think you are having a medical emergency, call 911 or your local emergency number.