selective serotonin reuptake inhibitors (SSRIs), 1049 tricyclic antidepressants, 1048 salicylates, 1050 –1052 Pharyngitis, in immunosuppressed host, 510 Pharyngotonsillitis, 329 Pharynx, 1104 Phencyclidine (PCP), 1069 , 1072 Phenethylamines, 1072 –1073 Phenobarbital, 456 , 497 Phenothiazine antipsychotics, 1049 –1050 Phentolamine, 245 Phenylephrine, 1336 Phenylketonuria, 333 Phenytoin, 456 , 497 , 885 Pheochromocytoma, 667 –668 Phimosis, 1334 –1335 Photophobia, 172 –173 , 188 , 190 Photosensitivity phytophotodermatitis, 436 –437 polymorphous light eruption (PMLE), 435 –436 Phototherapy, 297 –298 , 297 f Phototoxic reaction, 436 Physeal fractures, 1171 –1172 Physical abuse injuries, 620 –624 Physiologic mastalgia, 114 Phytophotodermatitis, 436 –437 , 437 f common plants associated with, 436 t hyperpigmentation due to, 437 f treatment for, 437 type IV hypersensitivity, 436 Pierre Robin syndrome, 380 Pigmentary mosaicism, 465 Pilomatricomas (calcifying epitheliomas), 1353 Pineal tumors, 907 Pinworms (Enterobius vermicularis) , 384 t, 530 Piperacillin, 81 t Pityriasis lichenoides, 472 , 472 f