Thiamine

Pregnancy & gynaecology-specific. Every dose row is source-referenced; verify against institutional protocols.

ThiamineEMERGENCY KITVitamin B1

Regimens checked: 2026-10-17. Each indication has its own preparation, limits and safety checks.

Thiamine: indication-specific regimens
Indication	Dose	Route	Frequency	Duration / preparation	Maximum	Monitoring / cautions
Prolonged vomiting or markedly reduced dietary intake; protect against thiamine deficiency RCOG / BJOGchecked	100 mg	Oral	Three times daily	While vomiting/restricted intake persists; review nutritional recovery · 100 mg tablet; if oral intake is unreliable, use prescribed parenteral supplementation BEFORE carbohydrate-containing fluids/nutrition	300 mg/day for this oral supplementation regimen; suspected Wernicke disease requires a treatment regimen, not oral prophylaxis	Monitor Dietary intake, weight, hydration; confusion, ataxia or eye-movement abnormalities require urgent assessment Contraindications / cautions Do not treat suspected Wernicke encephalopathy with low-dose oral supplementation alone
Prolonged HG with inability to retain oral thiamine; before IV carbohydrate/nutrition RCOG / BJOGchecked	100 mg parenteral thiamine as the initial supplementation dose; follow the local vitamin-B preparation for subsequent doses	Slow IV infusion	Before carbohydrate administration, with continued prescribed supplementation while intake is inadequate	Acute supplementation with daily nutritional review; change to oral 100 mg three times daily once retained · If the product is 100 mg/2 mL, use one ampoule diluted as specified by its label and infuse very slowly over 30 min. Monitor for hypersensitivity RCOG HG guidance describes oral thiamine or parenteral vitamin-B preparations; product composition and the ongoing course must be explicitly prescribed.	This is PREVENTION, not a Wernicke-treatment dose; suspected Wernicke needs urgent higher-dose specialist IV treatment	Monitor Hypersensitivity, mental state, eye signs, gait, electrolytes and nutrition Contraindications / cautions Do not delay lifesaving glucose in severe hypoglycaemia while searching for thiamine; give both promptly

Pregnancy safety

Essential

Lactation

Compatible

RCOG / BJOGcheckedIN REVIEW