Plan B and changes in taste or smell
Changes in taste (dysgeusia) or smell (parosmia, anosmia) are an under-recognised side effect category. Some medications produce a metallic taste, a dulling of flavours, or unusual smell perception. Whether Plan B (Levonorgestrel) at 1.5mg causes these changes depends on Levonorgestrel; the experience is usually benign but can affect appetite and quality of life.
Why taste and smell change on Plan B
Taste and smell perception relies on receptors in the tongue and nose that are sensitive to systemic medications. Levonorgestrel can affect taste through several mechanisms: alteration of saliva composition, direct receptor interference, secretion in saliva of medication metabolites, or changes in zinc handling. Plan B's primary mechanism is delaying or preventing ovulation when taken before the LH surge.
When changes need attention
Mild metallic taste or dulled flavours in the first weeks of Plan B at 1.5mg are common and often resolve as the body adjusts. Persistent severe loss of taste or smell, sudden onset, or interference with eating warrants prescriber review — both because the medication may need adjustment and because other causes (zinc deficiency, sinus disease) should be excluded.
Frequently asked questions
Can Plan B change my taste or smell? ▾
Yes, some users report taste or smell changes on Plan B at 1.5mg — typically a metallic or dulled-flavour sensation that develops in the first weeks. The prescribing information for Levonorgestrel lists frequency in clinical trials. Most cases are mild and resolve.
Will my taste come back when I stop Plan B? ▾
For most users, taste changes attributable to Plan B resolve within weeks of stopping the medication. Persistent loss after stopping, or severe loss while on therapy, deserves a clinical evaluation since other causes may be involved.
More on Plan B
- With alcoholPlan B and alcohol — is it safe to drink?
- With foodShould Plan B be taken with food?
- Side effectsPlan B side effects: common, rare and warning signs
- Dosage guidePlan B dosage guide: how much to take and when
- OnsetHow fast does Plan B start working?
- DurationHow long does Plan B last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.