Comparative Pharmacology
Head-to-head clinical analysis: FOLIC ACID versus THIAMINE HYDROCHLORIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: FOLIC ACID versus THIAMINE HYDROCHLORIDE.
FOLIC ACID vs THIAMINE HYDROCHLORIDE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Folic acid is a synthetic form of folate, a water-soluble B vitamin. It is reduced to dihydrofolate (DHF) and then to tetrahydrofolate (THF) via dihydrofolate reductase (DHFR). THF serves as a cofactor for one-carbon transfer reactions essential for purine and thymidine synthesis (DNA replication), amino acid metabolism (e.g., homocysteine remethylation to methionine), and other methylation reactions.
Thiamine hydrochloride is a water-soluble vitamin that acts as a cofactor for several enzymes involved in carbohydrate metabolism, including transketolase, pyruvate dehydrogenase, and α-ketoglutarate dehydrogenase. It is essential for the decarboxylation of α-keto acids and pentose phosphate pathway activity.
Oral or intramuscular/subcutaneous injection: 400-800 mcg daily for general supplementation; 1-5 mg daily for folate deficiency; 5-15 mg daily for megaloblastic anemia.
50-100 mg intravenously or intramuscularly once daily for deficiency; 100 mg intravenously for Wernicke encephalopathy (with 50-100 mg maintenance).
None Documented
None Documented
Clinical Note
moderateFolic acid + Teriflunomide
"The serum concentration of Teriflunomide can be increased when it is combined with Folic acid."
Clinical Note
moderateTiaprofenic acid + Folic acid
"The therapeutic efficacy of Folic acid can be decreased when used in combination with Tiaprofenic acid."
Clinical Note
moderateCarprofen + Folic acid
"The therapeutic efficacy of Folic acid can be decreased when used in combination with Carprofen."
Clinical Note
moderateCyproterone acetate + Folic acid
Terminal elimination half-life is approximately 0.7 hours (range 0.5-1.0 h) for folic acid; the active metabolite (5-MTHF) has a longer half-life of about 3-4 hours.
Terminal half-life: 9-18 days for whole body stores; plasma half-life: 1.5-2 hours for free thiamine.
Primarily renal (urinary) as intact folic acid and metabolites, accounting for 80-90% of the excreted dose; fecal elimination via bile is minor (<10%).
Renal: 40-50% as unchanged drug; metabolites: thiamine pyrophosphate, thiamine monophosphate. Fecal: minimal (<5%).
Category A/B
Category C
Vitamin
Vitamin
"The serum concentration of Folic acid can be decreased when it is combined with Cyproterone acetate."