Adverse reactions : תופעות לוואי

4.8   Undesirable effects
The most serious hazard of therapy is respiratory depression (see section 4.9). The commonest side-effects of morphine are • Nausea
• Vomiting
• Constipation
• Drowsiness
• Dizziness

Tolerance generally develops with long term use, but not to constipation. Other side effects include the following: Psychiatric disorders
• Dependence

Immune system disorders:
• Anaphylactic reactions following intravenous injection have been reported rarely, anaphylactoid reactions

Cardiac disorders:
•   Bradycardia
•   Palpitations
•   Tachycardia
•   Orthostatic hypotension

Nervous system disorders:
• Myoclonus
• Mental clouding
• Confusion (with large doses)
• Hallucinations
• Headache
• Vertigo
• Mood changes including dysphoria
• Euphoria
• Allodynia
• Hyperalgesia (see section 4.4)
• Hyperhidrosis
Gastrointestinal disorders:
• Dry mouth
• Biliary spasm

Eye disorders:
• Blurred or double vision or other changes in vision • Miosis
Reproductive system and breast disorders:
• Long term use may lead to a reversible decrease in libido or potency


Skin and subcutaneous tissue disorders:
• Pruritus
• Urticaria
• Rash
• Sweating
• Contact dermatitis has been reported and pain and irritation may occur on injection.
• Facial flushing

Musculoskeletal and connective tissue disorders
• Muscle rigidity

Renal and urinary disorders:
• Difficulty with micturition
• Ureteric spasm
• Urinary retention
• Antidiuretic effect
General disorders and administration site conditions:
• Drug withdrawal (abstinence) syndrome

Tolerance develops to the effects of opioids on the bladder.
The euphoric activity of morphine has led to its abuse and physical and psychological dependence may occur (see section 4.4).

Description of selected adverse reactions
Drug dependence and withdrawal (abstinence) syndrome.
Use of opioid analgesics may be associated with the development of physical and/or psychological dependence or tolerance. An abstinence syndrome may be precipitated when opioid administration is suddenly discontinued, or opioid antagonists administered or can sometimes be experienced between doses. For management, see 4.4.

Physiological withdrawal symptoms include: Body aches, tremors, restless legs syndrome, diarrhoea, abdominal colic, nausea, flu-like symptoms, tachycardia and mydriasis. Psychological symptoms include dysphoric mood, anxiety and irritability. In drug dependence, “drug craving” is often involved.

Reporting of suspected adverse reactions
Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product.
Any suspected adverse events should be reported to the Ministry of Health according to the National Regulation by using an online form https://sideeffects.health.gov.il