Amantadine Hydrochloride

Breast Feeding; Lactation; Milk, Human; Anti-Infective Agents; Antiparkinson Agents; Antiviral Agents; Dopamine Agents

FDA approved drugs -> Active ingredient

FDA approved drugs -> Active ingredient

Danger

H302 (99.5%): Harmful if swallowed [Warning Acute toxicity, oral]

P203, P260, P261, P264, P264+P265, P270, P271, P273, P280, P301+P317, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P318, P319, P321, P330, P363, P403+P233, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 210 reports by companies from 11 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Chemical: Tricyclo[3.3.1.13,7]decan-1-amine, hydrochloride

Hazard Traits - Developmental Toxicity

Tricyclo[3.3.1.13,7]decan-1-amine, hydrochloride (1:1) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Tricyclo[3.3.1.13,7]decan-1-amine, hydrochloride (1:1) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

REACH registered substance: Amantadine hydrochloride (EC: 211-560-2)

1-Adamantane ammonium chloride: Does not have an individual approval but may be used under an appropriate group standard

There is no specific antidote for an overdose of Amantadine. However, slowly administered intravenous physostigmine in 1 and 2 mg doses in an adult2 at 1- to 2-hour intervals and 0.5 mg doses in a child3 at 5- to 10-minute intervals up to a maximum of 2 mg/hour have been reported to be effective in the control of central nervous system toxicity caused by amantadine hydrochloride. For acute overdosing, general supportive measures should be employed along with immediate gastric lavage or induction of emesis. Fluids should be forced, and if necessary, given intravenously. The pH of the urine has been reported to influence the excretion rate of Amantadine. (L1744)

Acute overdosage of amantadine has resulted in cardiac dysfunction (e.g., arrhythmia, tachycardia, hypertension); pulmonary edema and respiratory distress (including adult respiratory distress syndrome); renal dysfunction (e.g., increased BUN, decreased creatinine clearance, renal insufficiency); or CNS toxicity (e.g., insomnia, anxiety, psychotic reactions, lethargy, somnolence, coma). Hyperthermia also has occurred with amantadine overdosage. In addition, seizures may be exacerbated in patients with a history of a seizure disorder (A620).

The mechanism of its antiparkinsonic effect is not fully understood, but it appears to be releasing dopamine from the nerve endings of the brain cells, together with stimulation of norepinephrine response. It also has NMDA receptor antagonistic effects. The antiviral mechanism seems to be unrelated. The drug interferes with a viral protein, M2 (an ion channel), which is needed for the viral particle to become "uncoated" once it is taken inside the cell by endocytosis.

Deaths have been reported from overdose with amantadine. The lowest reported acute lethal dose was 2 grams. Drug overdose has resulted in cardiac, respiratory, renal or central nervous system toxicity. Cardiac dysfunction includes arrhythmia, tachycardia and hypertension. Pulmonary edema and respiratory distress (including ARDS) have been reported. Renal dysfunction including increased BUN, decreased creatinine clearance and renal insufficiency can occur. Central nervous system effects that have been reported include insomnia, anxiety, aggressive behavior, hypertonia, hyperkinesia, tremor, confusion, disorientation, depersonalization, fear, delirium, hallucination, psychotic reactions, lethargy, somnolence and coma. Seizures may be exacerbated in patients with prior history of seizure disorders. Hyperthermia has also been observed in cases where a drug overdose has occurred.

Drug Induced Liver Injury Rank (DILIrank 2.0)

Amantadine hydrochloride

Ambiguous-DILI-concern

3

Warnings & precautions

DOI:10.1016/j.drudis.2016.02.015

No appreciable metabolism, although negligible amounts of an acetyl metabolite have been identified. Amantadine is well absorbed orally from the gastrointestinal tract. The mechanism of its antiparkinsonic effect is not fully understood, but it appears to be releasing dopamine from the nerve endings of the brain cells, together with stimulation of norepinephrine response. The antiviral mechanism seems to be unrelated. The drug interferes with a viral protein, M2 (an ion channel), which is needed for the viral particle to become "uncoated" once it is taken inside the cell by endocytosis. Metabolites are excreted in the urine (A308). Route of Elimination: It is primarily excreted unchanged in the urine by glomerular filtration and tubular secretion. Half Life: Mean half-lives ranged from 10 to 14 hours, however renal function impairment causes a severe increase in half life to 7 to 10 days.

AMANTADINE HCL

M2 Protein Inhibitors [MoA]; Influenza A M2 Protein Inhibitor [EPC]

AMANTADINE HYDROCHLORIDE

Influenza A M2 Protein Inhibitor [EPC]; M2 Protein Inhibitors [MoA]

Agents used in the treatment of Parkinson's disease. The most commonly used drugs act on the dopaminergic system in the striatum and basal ganglia or are centrally acting muscarinic antagonists.

Agents used in the prophylaxis or therapy of VIRUS DISEASES. Some of the ways they may act include preventing viral replication by inhibiting viral DNA polymerase; binding to specific cell-surface receptors and inhibiting viral penetration or uncoating; inhibiting viral protein synthesis; or blocking late stages of virus assembly.

Any drugs that are used for their effects on dopamine receptors, on the life cycle of dopamine, or on the survival of dopaminergic neurons.

A subclass of analgesic agents that typically do not bind to OPIOID RECEPTORS and are not addictive. Many non-narcotic analgesics are offered as NONPRESCRIPTION DRUGS.

All Other Basic Organic Chemical Manufacturing

Tricyclo[3.3.1.13,7]decan-1-amine, hydrochloride (1:1): ACTIVE