| Reaction | |
|---|
| Pain (294) | |
| Palinopsia / visual perseveration (4) | |
| Panic attack (20) | |
| Paralysis / paraplegia (23) | |
| Paranoia (27) | |
| Parasomnia (see the sleep-related adverse reactions) | |
| Paresis (8) | |
| Paresthesias (486) | |
| Parkinsonism (92) | |
| Parosmia (43) | |
| Parsonage-Turner syndrome (PTS) (brachial plexopathy; neuralgic amyotrophy) (5) | |
| Pavor nocturnus (1) | |
| Perioral paresthesias (5) | |
| Peripheral neuropathy (157) | |
| Periventricular leukomalacia (2) | |
| Posterior reversible encephalopathy syndrome (PRES) (see leukoencephalopathy) | |
| Presyncope (6) | |
| Primary central nervous system lymphoma (PCNSL) (2) | |
| Pseudohallucinations (5) | |
| Pseudoparkinsonism (1) | |
| Pseudotumor cerebri (see also intracranial hypertension) (28) | |
| Psychiatric adverse effect (11) | |
| Psychomotor impairment (8) | |
| Psychosis (145) | |
| Punding (3) | |
