Comparative Pharmacology
Head-to-head clinical analysis: PENICILLAMINE versus PENTETATE CALCIUM TRISODIUM.
Peer-Reviewed Evidence
Head-to-head clinical analysis: PENICILLAMINE versus PENTETATE CALCIUM TRISODIUM.
PENICILLAMINE vs PENTETATE CALCIUM TRISODIUM
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Chelates heavy metals (copper, mercury, lead, arsenic) forming soluble complexes excreted renally; also reduces cystine formation in cystinuria by disulfide exchange; immunosuppressive effects via inhibition of T-cell function and collagen synthesis.
Pentetate calcium trisodium is a chelating agent that forms stable complexes with divalent and trivalent heavy metal ions, such as plutonium, americium, and curium. It enhances the urinary elimination of these metals by increasing the rate of dissociation from tissues and promoting renal excretion.
250-500 mg orally 4 times daily, with a maximum of 2 g/day; for rheumatoid arthritis, initial dose 125-250 mg/day, increase by 125-250 mg every 1-3 months to usual maintenance of 500-750 mg/day in divided doses.
1 g (one vial) intravenously over 1 hour once daily for up to 5 days.
None Documented
None Documented
Clinical Note
moderatePenicillamine + Digoxin
"The serum concentration of Digoxin can be decreased when it is combined with Penicillamine."
Clinical Note
moderatePenicillamine + Teriflunomide
"The serum concentration of Teriflunomide can be increased when it is combined with Penicillamine."
Clinical Note
moderatePenicillamine + Eltrombopag
"The serum concentration of Eltrombopag can be increased when it is combined with Penicillamine."
Clinical Note
moderatePenicillamine + Iron
Terminal half-life: 1.5–2 hours for penicillamine; after chronic dosing, a slower phase (t1/2 ~40 hours) appears due to tissue binding. Clinical context: Dosing interval typically 6–8 hours; accumulation may occur in renal impairment.
Terminal elimination half-life is approximately 0.6-0.8 hours in patients with normal renal function.
Renal: ~80% as unchanged drug and metabolites; fecal: ~20% (via biliary elimination).
Primarily renal elimination via glomerular filtration; >90% of absorbed dose excreted unchanged in urine within 24 hours.
Category C
Category C
Chelating Agent
Chelating Agent
"Penicillamine can cause a decrease in the absorption of Iron resulting in a reduced serum concentration and potentially a decrease in efficacy."