Phenytoin Toxicity with High Dose, Concomitant Ascorbic Acid Dosing

High dose ascorbic acid may increase risk of phenytoin toxicity. This case report demonstrates high phenytoin levels resulting in adverse drug reactions subsequent to dosing concomitantly with high dose vitamin C, or ascorbic acid (AA), as a precaution against acquiring corona virus (COVID) infectio...

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Main Authors: Michael J. Schuh (Author), Kevin Mustain (Author), Sheena Crosby (Author)
Format: Book
Published: University of Minnesota Libraries Publishing, 2022-12-01T00:00:00Z.
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700 1 0 |a Sheena Crosby  |e author 
245 0 0 |a Phenytoin Toxicity with High Dose, Concomitant Ascorbic Acid Dosing 
260 |b University of Minnesota Libraries Publishing,   |c 2022-12-01T00:00:00Z. 
500 |a 10.24926/iip.v13i4.5122 
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520 |a High dose ascorbic acid may increase risk of phenytoin toxicity. This case report demonstrates high phenytoin levels resulting in adverse drug reactions subsequent to dosing concomitantly with high dose vitamin C, or ascorbic acid (AA), as a precaution against acquiring corona virus (COVID) infection. This patient suffered from a major seizure when he ran out of his phenytoin prescription. Subsequent initiation of phenytoin and later addition of high dose AA resulted in truncal ataxia and falls with bilateral wrist and finger extension weakness. Phenytoin and AA were discontinued, and the patient returned to baseline on a new medication regimen of lacosamide and gabapentin without any other major seizures one year later. 
546 |a EN 
690 |a phenytoin toxicity, vitamin C, ascorbic acid 
690 |a Pharmacy and materia medica 
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786 0 |n INNOVATIONS in Pharmacy, Vol 13, Iss 4 (2022) 
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