side effect 
noun
A secondary, typically undesirable effect of a drug or medical treatment: many anti-cancer drugs now in use have toxic side effects...
- Most of those who had had a stroke were aware of their own drug treatment and were concerned about the side effect of drugs.
- Tell your doctor if you have had a particular side effect from a pain medication in the past.
- If priapism has occurred as a side effect of medication then a different medication can usually be prescribed.
- go-kart
- go-karting
- Gokhale, Gopal Krishna
- Golan Heights
- Golconda
- gold
- gold-beater
- gold-beater's skin
- gold beetle
- Goldberg, Arthur Joseph
- Goldberg, Whoopi
- gold brick
- goldbricker
- goldbug
- gold card
- Gold Coast
- gold collar
- gold-colored
- gold-coloured
- gold commissioner
- goldcrest
- gold-digger
- gold-digging
- gold disc
- gold dust