For anemia, 25 milligrams of vitamin B6 has been taken by mouth in combination with multivitamins from the second trimester to delivery in pregnant HIV-positive women.
For anxiety, 50 milligrams of vitamin B6 has been taken by mouth in combination with magnesium daily.
For birth outcomes, the following doses have been taken by mouth: 20 milligrams daily; three lozenges daily with 6.67 milligrams of pyridoxine in each lozenge; 2.6-20 milligrams of pyridoxine HCl daily; 25 milligrams of pyridoxine HCl daily; and a single dose of 100 milligrams.
For carpal tunnel syndrome, 200 milligrams of vitamin B6 has been taken by mouth daily for 10-12 weeks.
For cognitive function, 20 milligrams of vitamin B6 has been taken by mouth daily for 12 weeks.
For dysmenorrhea, 200 milligrams of vitamin B6 has been taken by mouth daily.
For gestational diabetes, 100 milligrams of vitamin B6 has been taken by mouth daily for 14 days.
For high blood pressure, five milligrams of vitamin B6 per kilogram of body weight has been taken by mouth daily for four weeks.
For McArdle's disease, 50 milligrams of vitamin B6 has been taken by mouth daily for 10 weeks, without evidence of benefit.
For pregnancy-induced nausea and vomiting, the following doses have been taken by mouth: 25 milligrams of vitamin B6 every eight hours for 72 hours; 10 milligrams pyridoxine HCl every eight hours for five days; and 100 milligrams of vitamin B6 daily for seven days.
For premenstrual syndrome, up to 600 milligrams has been taken by mouth; however, 100 milligrams daily has been suggested as the optimal level, due to the potential for side effects at higher doses.