Tadalafil (Cialis) is used to treat erectile dysfunction ED impotence inability to get or keep an erection.

Zopiclone is a type of sleeping pill that can be taken for short-term treatment of severe insomnia. It helps you fall asleep more quickly, and also helps stop you waking up during the night. It works by affecting a calming chemical in your brain called (GABA).

Gabapentin is used to treat epilepsy. It’s also taken for nerve pain, which can be caused by different conditions, including diabetes and shingles. Nerve pain can also happen after an injury. In epilepsy, it’s thought that gabapentin stops seizures by reducing the abnormal electrical activity in the brain.

Modafinil is used to help people who have narcolepsy, obstructive sleep apnea/hypopnea syndrome (OSAHS), or shift work sleep disorder (SWSD) to stay awake during the day.