Who are Adjunctive Zonisamide's main competitors?

Direct comparators (same drug class / molecular target / therapeutic area): Low dose zonisamide, Oral Zonisamide Therapy, Placebo ZNS, Low dose carbamazepine, Standard dose lamotrigine, Lamotrigine (drug).

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Last reviewed 2026-05-15 · How we verify

Adjunctive Zonisamide — Competitive Intelligence Brief

Adjunctive Zonisamide (Adjunctive Zonisamide) competitive landscape: 6 comparators, recent regulatory actions, upcoming PDUFA, patent timeline. Class: Anticonvulsant / Antiepileptic drug. Area: Neurology.

marketed Anticonvulsant / Antiepileptic drug Voltage-gated sodium channels, T-type calcium channels, carbonic anhydrase Neurology Small molecule Live · refreshed every 30 min

Target snapshot

Adjunctive Zonisamide (Adjunctive Zonisamide) — Eisai Inc.. Zonisamide is an anticonvulsant that reduces neuronal excitability through multiple mechanisms including sodium and calcium channel blockade and carbonic anhydrase inhibition.

Comparator set (6 drugs)

Auto-detected by same drug class / molecular target / therapeutic area, ranked by phase + recency. Override with ?vs=slug1,slug2,….

Drug	Generic	Sponsor	Phase	Class	Target
Adjunctive Zonisamide TARGET	Adjunctive Zonisamide	Eisai Inc.	marketed	Anticonvulsant / Antiepileptic drug	Voltage-gated sodium channels, T-type calcium channels, carbonic anhydrase
Low dose zonisamide	Low dose zonisamide	Mario Negri Institute for Pharmacological Research	marketed	Anticonvulsant / Antiepileptic agent	Voltage-gated sodium channels, T-type calcium channels, carbonic anhydrase
Oral Zonisamide Therapy	Oral Zonisamide Therapy	Affiliated Hospital of Nantong University	marketed	Anticonvulsant / Antiepileptic drug	Voltage-gated sodium channels, T-type calcium channels, carbonic anhydrase
Placebo ZNS	Placebo ZNS	Impax Laboratories, LLC	phase 3	Anticonvulsant / Antiepileptic agent	Voltage-gated sodium channels, T-type calcium channels, carbonic anhydrase
Low dose carbamazepine	Low dose carbamazepine	Mario Negri Institute for Pharmacological Research	marketed	Anticonvulsant / Antiepileptic drug	Voltage-gated sodium channels
Standard dose lamotrigine	Standard dose lamotrigine	Mario Negri Institute for Pharmacological Research	marketed	Anticonvulsant / Antiepileptic drug	Voltage-gated sodium channels; glutamate release inhibition
Lamotrigine (drug)	Lamotrigine (drug)	MaineHealth	marketed	Anticonvulsant / Antiepileptic drug	Voltage-gated sodium channels; glutamate release inhibition

Recent regulatory actions (last 90 days)

No regulatory actions in the last 90 days for this set.

Upcoming PDUFA dates (next 180 days)

No PDUFA dates in the next 180 days for this set.

Patent timeline (forward window)

No upcoming patent expiries for this set.

Sponsor landscape (Anticonvulsant / Antiepileptic drug class)

Mario Negri Institute for Pharmacological Research · 3 drugs in this class
Eisai Inc. · 2 drugs in this class
Affiliated Hospital of Nantong University · 1 drug in this class
GlaxoSmithKline · 1 drug in this class
MaineHealth · 1 drug in this class
UCB Pharma · 1 drug in this class

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Cite this brief

Drug Landscape (2026). Adjunctive Zonisamide — Competitive Intelligence Brief. https://druglandscape.com/ci/adjunctive-zonisamide. Accessed 2026-05-15.

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