Comparative Pharmacology
Head-to-head clinical analysis: ASCORBIC ACID versus FOLIC ACID.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ASCORBIC ACID versus FOLIC ACID.
ASCORBIC ACID vs FOLIC ACID
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Ascorbic acid is a water-soluble vitamin that acts as an electron donor for several enzymatic reactions, including collagen synthesis, neurotransmitter synthesis, and carnitine synthesis. It also functions as a potent antioxidant, protecting cells from oxidative damage.
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.
Oral: 100-200 mg daily for prevention; 500-1000 mg daily for deficiency. IV/IM: 100-250 mg once daily for deficiency; higher doses (e.g., 1-3 g daily) for scurvy.
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.
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 half-life: 10-20 hours in healthy adults; prolonged in renal impairment. Clinical context: doses >200 mg/day lead to renal elimination of unchanged ascorbate, reducing half-life.
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.
Renal: 100% as unchanged drug and metabolites; tubular reabsorption is saturable; at high doses, excretion increases proportionally. Fecal: minimal.
Primarily renal (urinary) as intact folic acid and metabolites, accounting for 80-90% of the excreted dose; fecal elimination via bile is minor (<10%).
Category C
Category A/B
Vitamin
Vitamin
"The serum concentration of Folic acid can be decreased when it is combined with Cyproterone acetate."