Senega is a plant. The root is used to make medicine.

Senega is used for decline in memory and thinking skills that occurs normally with age, asthma, swelling (inflammation) of the throat, nose, and chest, and many other conditions, but there is no good scientific evidence to support these uses.

Coronavirus disease 2019 (COVID-19): Some experts warn that senega may interfere with the body's response against COVID-19. There is no strong data to support this warning. But there is also no good data to support using senega for COVID-19. Follow healthy lifestyle choices and proven prevention methods instead.
When taken by mouth: Senega is POSSIBLY SAFE when taken by mouth for up to 8 weeks. But it is POSSIBLY UNSAFE to use senega for more than 8 weeks. Long-term use may cause stomach irritation, diarrhea, dizziness, nausea, and vomiting.

When applied to the skin: There isn't enough reliable information to know if senega is safe or what the side effects might be.

Special Precautions & Warnings:

Pregnancy: It's LIKELY UNSAFE to take senega by mouth if you are pregnant. Senega might make the uterus contract, and it might also start menstruation. These effects could cause a miscarriage. There isn't enough reliable information to know if senega is safe to apply to the skin when pregnant. Stay on the safe side and avoid use.

Breast-feeding: There isn't enough reliable information to know if senega is safe to use when breast-feeding. Stay on the safe side and avoid use.

Fever: Senega can affect the central nervous system. Don't use it if you have a fever.

Stomach and intestinal conditions including peptic ulcers, ulcerative colitis, and Crohn disease: Don't use senega if you have one of these conditions. It can irritate the intestine.


NatMed Pro rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, Ineffective, and Insufficient Evidence to Rate.
Likely effective Effectiveness definitions
Possibly effective Effectiveness definitions
Likely ineffective Effectiveness definitions
Possibly ineffective Effectiveness definitions
Insufficient evidence Effectiveness definitions
  • Decline in memory and thinking skills that occurs normally with age. Taking senega might improve some thinking skills by a small amount in elderly adults with memory complaints.
  • Memory. Taking senega does not seem to improve memory in healthy adults. But it might help with short-term recall by a small amount.
  • Asthma.
  • Emphysema.
  • Bronchitis.
  • Swelling (inflammation) of the throat, nose, and chest.
  • Other conditions.
More evidence is needed to rate the effectiveness of senega for these uses.

Dosing & administration

The appropriate dose of senega depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for senega. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.

Interactions with pharmaceuticals

It is not known if Senega interacts with any medicines. Before taking Senega, talk with your healthcare professional if you take any medications.

Interactions with herbs & supplements

There are no known interactions with herbs and supplements.

Interactions with foods

There are no known interactions with foods.


The chemicals in senega irritate the lining of the stomach and lungs. Some chemicals in senega protect cells in the brain.
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