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Giving an intramuscular injection
Both use the same 0.9% benzyl alcohol formulation
Unlike oral supplements, injections bypass the digestive system for faster and more efficient absorption
You should contact your GP if you experience: Absence of periods for three consecutive cycles (amenorrhoea) if you previously had regular menstruation Unusually heavy bleeding (soaking through a pad or tampon every hour for several consecutive hours) or passing large clots Bleeding between periods or after intercourse, which requires investigation regardless of medication use Severe pelvic pain that differs from typical menstrual cramping Symptoms of anaemia including persistent fatigue, breathlessness, palpitations, or pallor Seek urgent medical help via NHS 111 or A&E for very heavy bleeding with dizziness or fainting, or severe abdominal pain that could indicate complications such as pancreatitis
