Opsovin 500 mg Tablet

Opsovin 500 mg tablet by Opsonin Pharma Limited contains Griseofulvin, one of the oldest oral antifungal medicines, still valuable today — particularly for scalp ringworm (tinea capitis) in children, and for skin and nail ringworm when creams alone fail. It acts only against dermatophytes, the fungi that cause ringworm; it does not work on yeast infections such as candida. It is a prescription medicine that requires long, patient courses.

Griseofulvin works in an unusual way: it deposits itself in the keratin of newly growing skin, hair and nails, making the new growth poisonous to the fungus, and it also jams the fungus's cell-division machinery. The infection clears as protected new keratin slowly replaces the infected old layers — which is why treatment takes weeks to months.

Opsovin is prescribed for ringworm (dermatophyte) infections that topical creams cannot clear, including:

• Scalp ringworm (tinea capitis) — the leading use, especially in school-age children, where creams cannot reach the fungus inside hair roots
• Widespread or stubborn ringworm of the body, groin or feet
• Nail ringworm (tinea unguium), when newer antifungals are unsuitable

Doctors often confirm the diagnosis with skin scrapings or hair samples first, because long treatment is justified only when fungus is genuinely present. Opsovin has no effect on candida, pityriasis versicolor or bacterial skin infections — using it for the wrong rash wastes months.

Take Opsovin with or just after a fatty meal — milk, eggs, peanuts or an oily curry — because fat dramatically improves absorption. Typical doses of Griseofulvin (microsize):

• Adults: 500 mg to 1 g daily, as a single dose or divided
• Children: 10–20 mg/kg per day, always calculated by a doctor

Expected durations — set by your doctor and not negotiable: skin ringworm 2–6 weeks; scalp ringworm 6–8 weeks or longer; fingernails about 4–6 months; toenails 6–12 months. The medicine only protects new growth, so it must be continued until infected hair, skin or nail has fully grown out. Keep taking Opsovin every day even when the patch looks healed.

Most side effects of Opsovin are mild and settle as treatment continues:

• Headache — common in the first days, usually fading within a week
• Nausea, stomach upset or diarrhoea
• Sun sensitivity: rash or burning on sun-exposed skin
• Dizziness, tiredness or altered taste

See a doctor promptly for signs of liver trouble (dark urine, yellow eyes, loss of appetite), severe skin reactions (blistering, peeling, mouth ulcers), unusual bruising or persistent sore throat and fever (possible blood-cell effects), or a butterfly-shaped facial rash with joint pains (a rare lupus-like reaction). Alcohol can cause flushing and a racing heart with this medicine — best avoided throughout the course.

Opsovin only succeeds if you respect its two rules: take it with fatty food every day, and complete the full long course. The fungus is killed slowly, as new protected keratin grows out — stopping when the patch looks clear almost guarantees relapse, and half-treated ringworm is fuelling Bangladesh's growing antifungal-resistance problem.

• Protect yourself from strong sunlight: wear covering clothes and use sunscreen, as the drug makes skin burn easily
• Avoid alcohol throughout treatment
• Tell your doctor about liver disease, porphyria or lupus before starting
• Women must avoid pregnancy during treatment and for 1 month after; men should not father a child during treatment and for 6 months after
• It can blunt the contraceptive pill — use additional protection

Griseofulvin speeds up certain liver enzymes and interacts with several important medicines. Tell your doctor everything you take, especially:

• Oral contraceptive pills: griseofulvin can make them fail — breakthrough bleeding or pregnancy is possible; use condoms or another added method during treatment and for a month after
• Warfarin: its blood-thinning effect can weaken, risking clots — INR needs closer monitoring
• Ciclosporin: levels may fall, threatening transplant protection
• Phenobarbital and similar enzyme inducers reduce griseofulvin's own absorption and effect
• Alcohol: causes flushing, headache and rapid heartbeat (a disulfiram-like reaction)

Do not start or stop any regular medicine during the long course without telling the prescriber you are on Opsovin.

Do not take Opsovin if you:

• Are pregnant — griseofulvin can harm the unborn baby and is strictly contraindicated; pregnancy must also be avoided for 1 month after stopping
• Have liver failure or severe liver disease
• Have porphyria (a rare inherited blood-pigment disorder) — the drug can trigger attacks
• Have systemic lupus erythematosus (SLE) or a related connective-tissue disease, which it can aggravate
• Are allergic to griseofulvin

Men are advised not to father a child during treatment and for 6 months afterwards, because the drug can affect sperm. Discuss family-planning timing openly with your doctor before committing to months of therapy.

Pregnancy: Griseofulvin is contraindicated in pregnancy — it can damage the developing baby and has been linked to chromosomal harm in experimental studies. Women must use reliable contraception (with a back-up method, since the drug weakens the pill) during the entire course and for 1 month after the last dose. Men should not father a child during treatment and for 6 months afterwards. Tell your doctor immediately if pregnancy occurs during treatment.

Breastfeeding: There are no adequate data on Griseofulvin in breast milk, so it should be avoided while nursing. Given that courses last weeks to months, discuss safer alternatives or feeding plans with your doctor first.

Store Opsovin below 30°C in a dry place, protected from light — keep the tablets in their original blister and carton, away from Bangladesh's humid bathroom shelves and hot kitchen corners. Because griseofulvin courses run for weeks or months, buy or refill only sealed, within-date packs and keep the running stock in one cool cupboard, always out of the reach and sight of children.

• Shake any Griseofulvin suspension well before each dose and follow the bottle's label on in-use life
• Never take tablets past their expiry date — potency loss invites treatment failure and resistance
• Return unused tablets to a pharmacy at the end of treatment