All the side effects listed by NICE for drugs used off label as 'puberty blockers'.
https://bnf.nice.org.uk/drugs/buserelin/
Common or very common
Depression; mood altered
Rare or very rare
Auditory disorder; hypotension; leucopenia; pituitary tumour benign; thrombocytopenia; tinnitus
Frequency not known
Alopecia; anxiety; appetite change; breast abnormalities; broken nails; concentration impaired; constipation; diarrhoea; dizziness; drowsiness; dry eye; dysuria; embolism and thrombosis; fatigue; feeling of pressure behind the eyes; follicle recruitment increased; galactorrhoea; gastrointestinal discomfort; gynaecomastia; hair changes; headache; hot flush; hydronephrosis; hyperhidrosis; increased risk of fracture; lymphostasis; memory loss; menopausal symptoms; menstrual cycle irregularities; muscle weakness in legs; musculoskeletal discomfort; nausea; oedema; osteoporosis; ovarian and fallopian tube disorders; pain; painful sexual intercourse; palpitations; paraesthesia; QT interval prolongation; sexual dysfunction; shock; skin reactions; sleep disorder; testicular atrophy; thirst; tumour activation temporary; uterine leiomyoma degeneration; vision disorders; vomiting; vulvovaginal disorders; weight changes
https://bnf.nice.org.uk/drugs/gonadorelin/
Uncommon
Pain; skin reactions; swelling
Rare or very rare
Abdominal discomfort; bronchospasm; dizziness; eye erythema; flushing; headache; nausea; tachycardia
Frequency not known
Menorrhagia; sepsis; thrombophlebitis
https://bnf.nice.org.uk/drugs/goserelin/
Common or very common
Alopecia; arthralgia; bone pain; breast abnormalities; depression; glucose tolerance impaired; gynaecomastia; headache; heart failure; hot flush; hyperhidrosis; mood altered; myocardial infarction; neoplasm complications; paraesthesia; sexual dysfunction; skin reactions; spinal cord compression; vulvovaginal disorders; weight increased
Uncommon
Hypercalcaemia (in women); ureteral obstruction
Rare or very rare
Ovarian and fallopian tube disorders; pituitary haemorrhage; pituitary tumour; psychotic disorder
Frequency not known
Abdominal cramps; body hair change; constipation; diarrhoea; fatigue; hepatic function abnormal; interstitial pneumonia; muscle complaints; nausea; nervousness; peripheral oedema (when used for gynaecological conditions); premature menopause; pulmonary embolism; QT interval prolongation; sleep disorder; uterine leiomyoma degeneration; voice alteration; vomiting; vulvovaginal infection; withdrawal bleed
https://bnf.nice.org.uk/drugs/leuprorelin-acetate/
Common or very common
With parenteral use
Appetite decreased; arthralgia; bone pain; breast abnormalities; depression; dizziness; fatigue; gynaecomastia; headache; hepatic disorders; hot flush; hyperhidrosis; insomnia; mood altered; muscle weakness; nausea; paraesthesia; peripheral oedema; sexual dysfunction; testicular atrophy; vulvovaginal dryness; weight change
Uncommon
With parenteral use
Alopecia; diarrhoea; fever; myalgia; palpitations; visual impairment; vomiting
Rare or very rare
With parenteral use
Haemorrhage
Frequency not known
With parenteral use
Anaemia; dyslipidaemia; glucose tolerance impaired; hypertension; hypotension; idiopathic intracranial hypertension; insulin resistance; interstitial lung disease; leucopenia; metabolic syndrome; osteoporosis; paralysis; pulmonary embolism; QT interval prolongation; seizure; severe cutaneous adverse reactions (SCARs); skin reactions; spinal fracture; thrombocytopenia; urinary tract obstruction; vulvovaginal infection
https://bnf.nice.org.uk/drugs/nafarelin/
Common or very common
Artificial menopause; breast abnormalities; chest pain; depression; dyspnoea; emotional lability; headaches; hirsutism; hot flush; hypersensitivity; hypertension; hypotension; insomnia; myalgia; oedema; oestrogen deficiency; paraesthesia; rhinitis; seborrhoea; sexual dysfunction; skin reactions; uterine haemorrhage; vulvovaginal dryness; weight changes
Uncommon
Alopecia; arthralgia; ovarian cyst (may require discontinuation)
Frequency not known
Ovarian hyperstimulation syndrome; palpitations; vision blurred
https://bnf.nice.org.uk/drugs/triptorelin/
Common or very common
Anxiety; asthenia; depression; diabetes mellitus; dizziness; dry mouth; embolism; gastrointestinal discomfort; gynaecomastia; haemorrhage; headache; hot flush; hyperhidrosis; hypersensitivity; hypertension; joint disorders; menstrual cycle irregularities; mood altered; muscle complaints; nausea; oedema; ovarian and fallopian tube disorders; pain; painful sexual intercourse; pelvic pain; sexual dysfunction; skin reactions; sleep disorders; weight changes
Uncommon
Alopecia; appetite abnormal; asthma exacerbated; chills; confusion; constipation; diarrhoea; drowsiness; dyspnoea; flatulence; gout; muscle weakness; taste altered; testicular disorders; tinnitus; vertigo; vision disorders; vomiting
Rare or very rare
Abnormal sensation in eye; chest pain; difficulty standing; fever; hypotension; influenza like illness; musculoskeletal stiffness; nasopharyngitis; orthopnoea; osteoarthritis; QT interval prolongation
Frequency not known
Angioedema; malaise