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PDE5 inhibitors are usually the drugs of first choice for erectile dysfunction.

PDE5 inhibitors enhance an erection that is
are usually the drugs ... #pharmacology #comparison ... #treatment #medications ... #dosing #drugs ... #table #pharmacotherapy
Back to the "10 Need to Know" series - Drug Therapeutic Target Levels. 

For lithium, target
Know" series - Drug ... vary depending on treatment ... #Pharmacology # ... Diagnosis #Table ... #Monitoring
Therapeutic Drug Level Monitoring 
Carbamazepine - Sample immediately before next dose (trough) 
Clozapine - Sample immediately
Therapeutic Drug ... - Intermittent dosing ... Therapeutic #Ranges #Toxicology ... #Pharmacology # ... Diagnosis #Table