Plan B
Brand name for a progestin-only emergency contraceptive designed to prevent pregnancy within 72 hours after a contraceptive accident or unprotected sex. However, early treatment is significantly more effective. Each 12 hours of delay in the start of treatment after intercourse generally reduces efficacy by 50%. Levonorgestrel, the active ingredient, is believed to act principally by interfering with the process of ovulation. It may also interfere with fertilization or implantation. It is not effective once implantation has begun. It is not an abortifacient. Common side effects include nausea, abdominal pain, fatigue, headache, and menstrual changes.
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- Plano
In practical optics, a surface that has been worked flat.
- Plano-
Flat. A lens that is planoconvex is flat on one side and convex on the other.
- Plant thorn arthritis
McGraw-Hill Professional, 2012.
- Plantar
Having to do with the sole of the foot.
- Plantar fasciitis
Inflammation of the plantar fascia, the bowstring-like tissue that stretches from the heel bone to the base of the toes. Plantar fasciitis can be due to calcaneal spurs, which typically cause localized tenderness and pain that is made worse by stepping down on the heel. Plantar fasciitis may be related to physical activity overload, abnormal […]