Sleep problems are seen in people who report poor sleep quality, find it difficult going to sleep or maintaining sleep. Insomnia is classified by its duration:

Transient (a few days)

Short-term (up to 4 weeks)

Chronic (greater than 4 weeks).

Causes 
  • Age
  • Depression 
  • Anxiety 
  • Work shift pattern 
  • Sleeping during the day 
  • Underlying medical condition such as pain, movement disorders (e.g. restless legs) or respiratory conditions (e.g. sleep apnoea)
  • Medications (Stimulants, SSRI, diuretics, beta blockers, antieplieptics)
  • Environmental noise 
  • Pregnancy 


Referral Criteria 

GP Referral:

  • Over 4 weeks
  • Children under 12 years
  • Daily activities affected by insomnia 
  • Signs of depression or anxiety
  • Drug abuse e.g. amphetamines
  • No cases of insomnia lasting longer than 4 weeks should be treated with OTC medication. 
  • If insomnia has caused by the patient’s pre- existing condition/medicines



Differntial Diangnosis 
  • Insomnia can be symptoms of depression.
  • Signs of drug abuse e.g. amphetamines.
  • Rebound insomnia may be seen with withdrawal symptoms with hypnotics or antidepressants.


Patient Tips
  • ‘Good sleep hygiene’ should be promoted  
  • Remove elements that stimulate activity, such as televisions or mobile phones
  • A hot bath, with the addition of lavender essential oils
  • Advise to avoid caffeine in the evening and avoid heavy meals before bedtime.
  • Advise not to use alcohol as a sedative as rebound excitation can cause early morning wakening and its diuretic effects can affect your sleep.
  • Keep a sleep diary to find factors which trigger irregular sleep.

Pharmacological Treatments

Antihistamines

Promethazine (Sominex®) and diphenhydramine (Nytol®) are licensed to aid the relief of temporary sleep disturbance.

Patients should not take antihistamines for more than 7 to 10 continuous days as tolerance to their effect can develop.

License: Over 16 years

Side effects: Dry mouth, sedation and fatigue the following day

Interactions: Increased sedation with alcohol, opioid analgesics, anxiolytics, hypnotics and antidepressants

Pregnancy and breastfeeding: Some manufacturers advises to avoid- consult product literature. Occasional use in breastfeeding considered fine, but discontinue if baby becomes drowsy.