Mentha piperita can dispel wind-heat, relieve liver-qi, promote pharyngeal penetration of rashes (to clear the throat, penetrate the rash), clear the head and eyes, mint has not yet been found to have spermicidal conclusions of the study.
Peppermint can dispel wind-heat and relieve headache, chills, dry throat and sore throat caused by wind-heat; it can also dispel liver qi and relieve pain in the ribcage caused by liver qi stagnation.
Peppermint can benefit the pharynx and penetrate the rash, relieve sore throat, measles can not penetrate the hair, rubella itching, etc.; can also clear the head and eyes, to relieve the eyes red, swollen and painful, wind-heat caused headache and so on.
Peppermint adverse reactions and contraindications are not exact, there is no authoritative conclusions that can kill sperm, do not feel free to believe the rumors. The use of peppermint needs the help of professional medical guidance.