Muscle weakness
Proximal extremities
Neck extensors
Facial/bulbar muscles (dysphagia, dysarthria, dysphonia)
Ocular weakness
Ptosis
Diplopia
CN III, IV, or VI weakness
Symptoms worsen with repetitive use / as the day progresses
Proximal extremities
Neck extensors
Facial/bulbar muscles (dysphagia, dysarthria, dysphonia)
Ptosis
Diplopia
CN III, IV, or VI weakness
Myasthenia gravis
Antibiotics 
Polymyositis
Steroids
Lambert-Eaton myasthenic syndrome
Anticonvulsants 
Tick paralysis
Psychotropics 