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Pollen Extract vs Stellate Ganglion Block

A side-by-side comparison of two menopause relief methods — efficacy, cost, how they work, and who shouldn't use them.

Last verified October 11, 2026Updated October 11, 2026

Side-by-side comparison

Pollen Extract A dietary supplement made from Swedish flower pollen that may reduce hot flashes, available over the counter.
Stellate Ganglion Block An injection of local anesthetic into a nerve bundle in the neck that may interrupt hot flash signals for several months.

Method	Pollen Extract A dietary supplement made from Swedish flower pollen that may reduce hot flashes, available over the counter.	Stellate Ganglion Block An injection of local anesthetic into a nerve bundle in the neck that may interrupt hot flash signals for several months.
Efficacy	Pollen Extract Not recommended Not recommended by the Menopause Society.	Stellate Ganglion Block Recommended (limited evidence) Recommended with limited evidence by the Menopause Society.
Cost	Pollen Extract $33–$58 monthly Insurance: Varies	Stellate Ganglion Block Contact provider Insurance: Varies
Duration	Pollen Extract Daily supplement (ongoing)	Stellate Ganglion Block One injection; effects followed for 6 months in the main trial
Reversibility	Pollen Extract Reversible	Stellate Ganglion Block Reversible
STI protection	Pollen Extract No	Stellate Ganglion Block No
How it works	Pollen Extract A 2020 review describes pollen extract as an SSRI-like therapy and reports that preclinical studies found no estrogenic effect. It is a dietary supplement, not an FDA-approved drug.	Stellate Ganglion Block A clinician injects local anesthetic into the stellate ganglion, a nerve bundle in the neck that is part of the sympathetic nervous system. This may interrupt the temperature-regulation signals that trigger hot flashes.
Prescription	Pollen Extract Not required Direct-to-Consumer (Physical)	Stellate Ganglion Block Required In-Person Procedure
Side effects	Pollen Extract None reported	Stellate Ganglion Block Drooping eyelid (Horner's syndrome, temporary) Temporary hoarseness Dizziness Rare serious complications (seizure if injected into a blood vessel, bleeding)
Who shouldn't use this	Pollen Extract None reported	Stellate Ganglion Block Active local or systemic infection Bleeding disorder Allergy to local anesthetic

Key differences

Menopause Society rating: Pollen Extract, not recommended; Stellate Ganglion Block, recommended (limited evidence). How long it lasts: Pollen Extract, daily supplement (ongoing); Stellate Ganglion Block, one injection; effects followed for 6 months in the main trial. A prescription is needed for Stellate Ganglion Block, not for Pollen Extract. Pollen Extract: costs $33–$58 monthly. Stellate Ganglion Block: Contact provider.