Comparative Pharmacology
Head-to-head clinical analysis: ASCORBIC ACID versus THIAMINE HYDROCHLORIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ASCORBIC ACID versus THIAMINE HYDROCHLORIDE.
ASCORBIC ACID vs THIAMINE HYDROCHLORIDE
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.
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: 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.
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
moderateAscorbic acid + Cyclosporine
"The serum concentration of Cyclosporine can be decreased when it is combined with Ascorbic acid."
Clinical Note
moderateAscorbic acid + Bortezomib
"The therapeutic efficacy of Bortezomib can be decreased when used in combination with Ascorbic acid."
Clinical Note
moderateAscorbic acid + Benzphetamine
"The serum concentration of Benzphetamine can be decreased when it is combined with Ascorbic acid."
Clinical Note
moderateAscorbic acid + Amphetamine
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 half-life: 9-18 days for whole body stores; plasma half-life: 1.5-2 hours for free thiamine.
Renal: 100% as unchanged drug and metabolites; tubular reabsorption is saturable; at high doses, excretion increases proportionally. Fecal: minimal.
Renal: 40-50% as unchanged drug; metabolites: thiamine pyrophosphate, thiamine monophosphate. Fecal: minimal (<5%).
Category C
Category C
Vitamin
Vitamin
"The serum concentration of Amphetamine can be decreased when it is combined with Ascorbic acid."