| Reaction | |
|---|
| Pain (291) | |
| Palinopsia (4) | |
| Panic attack (20) | |
| Paralysis (22) | |
| Paranoia (26) | |
| Paresis (8) | |
| Paresthesias (481) | |
| Parkinsonism (92) | |
| Parosmia (43) | |
| Perioral paresthesias (5) | |
| Peripheral neuropathy (149) | |
| Periventricular leukomalacia (2) | |
| Presyncope (6) | |
| Primary lymphoma of the central nervous system (2) | |
| Pseudohallucinations (5) | |
| Pseudoparkinsonism (1) | |
| Pseudotumor cerebri (28) | |
| Psychic changes (4) | |
| Psychomotor impairment (8) | |
| Psychosis (136) | |
| Punding (3) | |
